Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa4c25267be5463b…

MALICIOUS

PDF

41.8 KB Created: 2020-08-11 19:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 292040264b233e2118c70c468f776a56 SHA-1: 0314ee3e5790d36fa215f9c775f1f71319585afb SHA-256: aa4c25267be5463b243c0db20cbc63a6bd6b538fcc730c23db9f10e87d0b3e77
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a significant number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the text 'core banking system pdf', suggesting a lure to trick users into clicking the malicious link. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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=core+banking+system+pdf In PDF document text
    • http://files.bigyogaonline.com/uploads/1/3/0/7/130776049/jumawobazomafuw.pdfIn PDF document text
    • http://files.thatspeechlady.co.uk/uploads/1/3/1/0/131069781/xugexu.pdfIn PDF document text
    • http://nomob.walkaboutjesus.com/uploads/1/3/1/4/131438142/lenaforegowu.pdfIn PDF document text
    • http://files.committedcommunitymentors.org/uploads/1/3/1/8/131871730/02911e44baaa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/10277363494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8073/6165/files/22727762340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8354/6267/files/56813231510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3804/0487/files/99923573613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6352/5026/files/bonixolexoxaridodoziw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/kogorizedexavamovow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2240/1192/files/50917313807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1136/6309/files/32754859533.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8741/9805/files/40446878200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6279/6186/files/1_mb_file_test.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58BE 5444 bytes
SHA-256: b19a66aa533edb6cc574403c29968d3f8d93034e51445dafaafc430e1c36adb9
font_01_sfnt_off00006b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2E 9740 bytes
SHA-256: 9e3dd691a168e0ca7e500c46dfa88c9f5ab1efdc19d3bf7943ed39140522b21c
font_02_sfnt_off00008c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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