Malicious PDF — malware analysis report

Static analysis result for SHA-256 c144b236e14cdedc…

MALICIOUS

PDF

41.7 KB Created: 2020-08-11 18:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5cb836375b032eb975091f9a677ed28d SHA-1: fa55f4db0909f82c9ffdb245b4cb336eb88b4898 SHA-256: c144b236e14cdedc5ca2dff3a3c6adcebf306356244d8cedce27e7bf6ded09c9
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests a link farm or SEO poisoning tactic designed to funnel users to malicious content. The document body, though heavily obfuscated, also contains the URL 'https://ttraff.ru/pify?keyword=air+waybill+definition+pdf', reinforcing the malicious intent. No scripts were extracted, limiting the analysis of direct payload execution.

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=air+waybill+definition+pdf In PDF document text
    • http://files.bournemouthoutriggercanoeclub.com/uploads/1/3/1/4/131437064/losesubexogomulareju.pdfIn PDF document text
    • http://jibupenum.just-verandas.com/uploads/1/3/1/4/131408024/5480193.pdfIn PDF document text
    • http://xipudo.staffdevjnkie.net/uploads/1/3/0/7/130738524/3042044.pdfIn PDF document text
    • http://files.torahtreasury.com/uploads/1/3/2/6/132680813/4fc686e3002c.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/1/0435/9133/6099/files/busuu_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0346/0259/files/63840321387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5004/1495/files/immanuel_kant_was_ist_aufklrung.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5388/3293/files/benign_positional_vertigo_handout.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/tawewel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/pebirowazavuneronubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8141/4296/files/bijegurasojifimejojujupip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6503/9261/files/pozedulovixefod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/girarumike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6371/9574/files/echo_srm_225_manual.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_off000066c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C7 5180 bytes
SHA-256: 60d298ffeca8d1d13c890c4519a8f4742342a254e79044e86a295d9246a9324a
font_01_sfnt_off00007882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7882 9832 bytes
SHA-256: f6ac86d39e3e7b43813c60a06d32631bcc8fb00b20cf5dc274a322b506c758e6

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