Malicious PDF — malware analysis report

Static analysis result for SHA-256 9937e8217d8b8d2c…

MALICIOUS

PDF

33.4 KB Created: 2020-08-19 16:40:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a0ba735e0d9e487311eb0c2939250518 SHA-1: deeab84faf7270b907d2840f44730945581795b4 SHA-256: 9937e8217d8b8d2c9d285a0ed0d608d8fea015748d634a6b802e77ef955bdc72
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is also present in the document body. Additionally, it exhibits a PDF link farm pattern with numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be a social engineering lure disguised as a financial report to trick users into clicking the malicious link.

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=quickbooks+report+uncleared+cheques In PDF document text
    • http://faleg.maysplumbingworks.com/uploads/1/3/0/8/130814729/rujixapixorarunu.pdfIn PDF document text
    • http://files.swisskissgreaterswiss.com/uploads/1/3/0/8/130814343/zozabugopojix_punoje_dotaxum_rudesilebug.pdfIn PDF document text
    • http://tarop.philscrap.com/uploads/1/3/1/6/131606289/dabovunedodid.pdfIn PDF document text
    • http://files.gangneungtours.com/uploads/1/3/1/4/131453143/pazivisakeze-rixoforaverif-zufuzopoz.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/1/0430/5040/1943/files/ligoton.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/pesetimokomidik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8107/8686/files/keduraruxadutimujatise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9178/7937/files/swing_trading_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/ropatifusajakorekulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0653/3525/files/retefakaxedanogifitujog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8237/4561/files/afunika_piki_piki_skirt_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9056/6556/files/axonotmesis_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5091/6247/files/asphalt_8_apk_free_highly_compressed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3318/8762/files/jotalerexe.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 8

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_off000048b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48B3 5552 bytes
SHA-256: 00f41aa49f27319eed155f17962ac5de01211fc472fb1dc177f607eaf84ee7ae
font_01_sfnt_off00005b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B74 8696 bytes
SHA-256: f8d62b7d3cca450dcc23404d6ffadb92a7a0122aabf1151b2d148e3e5d7c7813

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