Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6beee45426c808d…

MALICIOUS

PDF

44.2 KB Created: 2020-08-22 19:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 63b1597d698dad1f7ed85c8e165f9330 SHA-1: f41ed41e9af33b2f41d99af98ebabf9e63d0d775 SHA-256: a6beee45426c808d07c0585c64903e3286ac31cebfa6dea257706a0d8f6fc6ac
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'spelling numbers' and includes the malicious URL. The presence of a 'LOLBin command execution instruction' heuristic suggests potential for further malicious activity, likely initiated by the user clicking the link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=spelling+numbers+1+to+100+worksheets+pdf In PDF document text
    • http://files.emilytvanek.com/uploads/1/3/1/3/131382032/pamafa_wamajinimisa_vefapatukuze.pdfIn PDF document text
    • http://files.anxious-but-fabulous.com/uploads/1/3/1/4/131484328/bojazob.pdfIn PDF document text
    • http://files.nicholasruscettaart.com/uploads/1/3/1/4/131453651/6275953.pdfIn PDF document text
    • http://jaraluf.lydiasjourney.com/uploads/1/3/1/4/131408229/fd44d6b.pdfIn PDF document text
    • http://files.curleyscience.com/uploads/1/3/0/7/130740477/busifunopujovo_zakupexibapin_sapujatobukexav_bigolorotiki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5962/5627/files/nevoxaludemiwifax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9154/9590/files/drugstore_cowboy_james_fogle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6997/3415/files/welojubalata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2733/2252/files/bunavaxutugafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nuruge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9318/1081/files/jijexozunugedipewori.pdfIn macro / runtime command snippet
    • https://cdn.shopify.com/s/files/1/0437/5071/9637/files/dell_r710_hardware_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6113/2962/files/7787512126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9715790575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2331/8686/files/rebalasonusatoxumem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4015/3505/files/speak_well_english_book_in_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7180/7381/files/gungeon_heavy_boots.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/7868/3541/files/crack_ielts_in_a_flash_speaking_1.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6203 5720 bytes
SHA-256: b0ed891232af32fce07d011aa55508dfe152c49b0a7b02dfdf2ce4640bd7441c
font_01_sfnt_off0000755c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x755C 9468 bytes
SHA-256: bfdb3a16b9751b6389679084c25b70bd903bd89dbf5c1de856c333dd763b2773
font_02_sfnt_off000095b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95B5 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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