Malicious PDF — malware analysis report

Static analysis result for SHA-256 1850b52d9e3e0a8d…

MALICIOUS

PDF

117.0 KB Created: 2020-07-23 14:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 649a039bf9aec0f991b3cde0617fa793 SHA-1: 5012defe8046f41405d42abf3c619c4dd48481ec SHA-256: 1850b52d9e3e0a8dd635c3063f712c44c946ab34c455c47096ff8f6e5ea5bcf3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing for redirector infrastructure. The primary link points to 'ttraff.com', a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'plague history pdf'. The presence of many external PDF links, some hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=plague+history+pdf
    • http://files.exitrealtyeastpm.com/uploads/1/3/0/7/130776049/3196014.pdf
    • http://files.crazymountainforge.com/uploads/1/3/1/3/131384432/riwilifijez.pdf
    • http://files.buckinghambear.com/uploads/1/3/0/7/130740298/2e7e74ea99a32.pdf
    • http://files.hartsvillecommunityplayers.org/uploads/1/3/1/1/131163976/64a4f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1758/4283/files/15249013168.pdf
    • https://cdn.shopify.com/s/files/1/0429/2204/9695/files/28181970688.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/55960137647.pdf
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/29620350858.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3535/files/nonepasopikujopok.pdf
    • https://cdn.shopify.com/s/files/1/0430/8104/0033/files/60817677434.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/fufelemivaxuretenesawil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46391305542.pdf
    • https://cdn.shopify.com/s/files/1/0439/4565/6488/files/93555954073.pdf
    • https://cdn.shopify.com/s/files/1/0431/0925/3282/files/81714296240.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000176fb.bin
dc96dfc4edc19dcadb4072d0239f9bbb95f62db96ffec604abfa6945e2703713		 pdf-font-stream PDF embedded font (sfnt) at offset 0x176FB 5184 bytes
font_01_sfnt_off000188b4.bin
d3a17a258d1c38ebeb50df0fdc5726744311baa0b738722a077a6d65871c2cd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x188B4 12244 bytes
font_02_sfnt_off0001b123.bin
ea60aea6f1610a102d369c28b98639571d166f16f37a817cf41f62260559d62d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B123 16180 bytes

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