Malicious PDF — malware analysis report

Static analysis result for SHA-256 21e2b7186daf4c3d…

MALICIOUS

PDF

41.6 KB Created: 2020-08-23 22:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 23d5cf77fc4d80c082ac1207d37ffd68 SHA-1: 64cfeaad3ebcfeb0a1f6f72b3035ee5ecd379eab SHA-256: 21e2b7186daf4c3d91d1f285cae95d8b93b841e4f021b5789ce0dd02bc1891ce
202 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One prominent link, 'https://ttraff.ru/pify?keyword=autocad+2014+manual+pdf+free', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and appears to be designed as a lure, likely to trick users into downloading malware or visiting a phishing page.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=autocad+2014+manual+pdf+free In PDF document text
    • http://files.southwesterngmtc.com/uploads/1/3/1/8/131857315/subazevironarag.pdfIn PDF document text
    • http://files.nelkesommerdijk.com/uploads/1/3/1/4/131453109/nogexevutazu-levelunavox-zosesujuviz.pdfIn PDF document text
    • http://files.crystalsontherocks.com/uploads/1/3/0/7/130775868/9dac0b.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/1/0440/5755/9190/files/i_m_gonna_yartz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2324/4191/files/84994414839.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5364/4966/files/juxapimolofawadovunez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6620/4066/files/novobuzuzitukekaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1712/6563/files/nazuximusijimiwarav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7952/2722/files/22726010967.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6628/5464/files/sexepuzik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8201/5135/files/varigopodinojifabopo.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_off000064f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F8 5528 bytes
SHA-256: 795a142f17584d219ec145e02f957f9c1b3fb477cff475abbea03ed126f495df
font_01_sfnt_off000077b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77B0 10052 bytes
SHA-256: 18432df5194369a32164773c4dc028aeadfde890c33c61051368d25ea33ce17c

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