Malicious PDF — malware analysis report

Static analysis result for SHA-256 10de433cd4e04e1f…

MALICIOUS

PDF

112.7 KB Created: 2020-08-06 17:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c917c72e942b6b897135713d323950b1 SHA-1: 333883d4b8c836c8bf6d0ff1ef4b31138650f032 SHA-256: 10de433cd4e04e1fd7759eb351124f4c4547fa24e3202d1e048a9ae64d78df79
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector found by heuristics. This suggests the document is designed to lead users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, but the presence of numerous links points to a redirection-based attack.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=metro+map+dc+pdf
    • http://jepexowe.picassofaceandbodypainter.com/uploads/1/3/0/8/130873826/sanujanafepenapimose.pdf
    • http://files.onehopecoc.com/uploads/1/3/1/4/131453216/86c530c.pdf
    • http://files.portclintonattorney.com/uploads/1/3/0/7/130776158/dcddfa5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/0958/6853/files/95836070509.pdf
    • https://cdn.shopify.com/s/files/1/0428/8741/3923/files/rivosuzozilijixemivazigu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8306/2695/files/brick_bond_patterns.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/probability_and_statistics_4th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0979/files/fizevagexi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5335/7985/files/84274403955.pdf
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/6152890442.pdf
    • https://cdn.shopify.com/s/files/1/0435/3123/9588/files/94918149729.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/bajosuvufokivazekofibarap.pdf
    • https://cdn.shopify.com/s/files/1/0431/2347/4583/files/37639375942.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/54314512836.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2695/files/42584850456.pdf
    • https://cdn.shopify.com/s/files/1/0436/4396/1494/files/zigibuziseme.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016ffa.bin
0f62546bdd24c54d9054ac32d8c2c8e611d9a1b84454849771125225c2cb5985		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16FFA 5096 bytes
font_01_sfnt_off00018144.bin
05d459ce8240e2cf8701f3d33379f1b5bd0603630c81fd0b54eb7150347cc91c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18144 17184 bytes

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