Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c4963f1e8d465a7…

MALICIOUS

PDF

37.4 KB Created: 2020-08-23 00:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8fee90d1d722b647ba9f052f7d2a81da SHA-1: 32fb3dd5b2fa2027c9566f83f46edd1af21617c6 SHA-256: 1c4963f1e8d465a714e09c11e4d02c42e5c965f851273a106e121454b72574c4
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=russian+possessive+pronouns+pdf'. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to 'Russian possessive pronouns'. The presence of multiple links to external PDFs, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted, but the primary attack vector is the redirection to a malicious site.

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.com/pify?keyword=russian+possessive+pronouns+pdf In PDF document text
    • http://files.csmmttaiwin.com/uploads/1/3/2/7/132710783/vowosevuxupagotazere.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/1/0432/5317/0339/files/dolabolanububonegug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1955/9335/files/egypt_pyramids_information.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7247/9647/files/66582693207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7730/2427/files/saxepekafasomovifajopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8517/6736/files/87440363232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5007/2214/files/jisilena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0266/6914/files/xipuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/naviw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/3236/2390/files/nitarimojotibelikafodigon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doworefobose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8746/2551/files/ordering_all_3_credit_reports.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8344/7966/files/82300399873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5521/0905/files/delagigifeferulas.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 2

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_off00005578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5578 5068 bytes
SHA-256: 9c649cc830524c179459a053ce05ca13f855834ee58a76b7ce5ef930213e4626
font_01_sfnt_off000066c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C8 9876 bytes
SHA-256: 8aea796184e7de9a8a80500cfffd7103ce2ffa115004a047cc4eac407e57525b

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