Malicious PDF — malware analysis report

Static analysis result for SHA-256 42db4fabc3c641b6…

MALICIOUS

PDF

41.0 KB Created: 2020-08-11 13:46:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a88e335bce013397459d6752e9410ca1 SHA-1: def26e18ac62ad5cede7ef56613af281ca05e2bb SHA-256: 42db4fabc3c641b64b616e982b78f25574dcc43bbeef26d552b875312500aa0c
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'PDF to word converter free' and the malicious URL, suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.ru/pify?keyword=pdf+to+word+converter+free In PDF document text
    • http://files.rowseyforthehouse.com/uploads/1/3/0/9/130969999/vagotavuretukuduj.pdfIn PDF document text
    • http://vawaju.robertrosell.com/uploads/1/3/0/7/130776433/xavuluduxukikozow.pdfIn PDF document text
    • http://files.lwordstory.com/uploads/1/3/0/7/130776131/noxubuduto_netasujijamabe_zixebu.pdfIn PDF document text
    • http://files.balancedmedispa.com/uploads/1/3/1/4/131452904/dd7292618d28637.pdfIn PDF document text
    • http://refukawu.subsurface-baits.com/uploads/1/3/1/4/131437515/mexabel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1504/4245/files/bujerewifebibidogaxirur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/kotor_walkthrough.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3997/3788/files/92702258159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0611/3430/files/68723699497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/cost_and_management_accounting_n6_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7020/1760/files/1553073196.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/4391/7719/files/endlessly_beautiful.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9038/5821/files/84937033534.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2909/3800/files/38423251216.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3330/4986/files/borofularixobodovofawa.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 4

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A6 4748 bytes
SHA-256: abfeb6445facd843d4e3eb48d422096da1c472a22fed4ee774ca3e711b953eaa
font_01_sfnt_off000075ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75EF 9860 bytes
SHA-256: eee3e632cb8c1e50933fa36257b328ed03c4cb0a1906c4e6571be9c9f26f5aac

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