Malicious PDF — malware analysis report

Static analysis result for SHA-256 9985a0dcf66b0f15…

MALICIOUS

PDF

49.6 KB Created: 2020-08-10 08:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 99a4406458826269686575a5ac8de918 SHA-1: 572c74731a3b4b4559d24a65727ff6f746a70579 SHA-256: 9985a0dcf66b0f1584c5f00b3a36a1651964836e213b1bde5fe9c0d1dde51572
194 Risk Score

Malware Insights

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

This PDF file contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains text that appears to be a lure related to "translation reflection rotation worksheets pdf". The primary malicious IOC is the redirector URL, which likely leads to further malicious content. The ML classifier 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=translation+reflection+rotation+worksheets+pdf In PDF document text
    • http://files.newspringscommunity.org/uploads/1/3/1/3/131384127/2837e2725.pdfIn PDF document text
    • http://files.tprb1023fm.com/uploads/1/3/1/3/131381555/dabepoxotipogetosu.pdfIn PDF document text
    • http://files.rim-foundation.org/uploads/1/3/1/4/131453214/wolinugime_jenotenawapi_wituvixiwulejam.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/1/0434/5597/1492/files/25009100686.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1708/4839/files/kibejakonilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9575/2858/files/69996807889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2831/5293/files/myasthenia_gravis_adalah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7950/7870/files/rexazujuwatefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/nmr_spectroscopy_applications.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5868/3291/files/rebetisubekiwelaludaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2099/9064/files/wafiragugebubiziw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/english_to_bangla_vocabulary_for_ielts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5496/3617/files/7114602196.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pifafesilepobusofamut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48975286879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9448/1821/files/88387429970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3540/1112/files/xuguxif.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 7

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_off000083be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83BE 5348 bytes
SHA-256: 146bcb1c253016a509abc231ab6fadd58b780b5f4328e7989bd7d1ba2156ea38
font_01_sfnt_off000095fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95FA 10216 bytes
SHA-256: 8ade48fb87791dd8bdbeb94944b8637b01edf3ea69894a4f28c5aaa47b8ac5fc

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