Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae7c13f1bc23bac…

MALICIOUS

PDF

48.7 KB Created: 2020-08-07 23:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b164c3cc994994130c4d8bb610c9326 SHA-1: d5e79153e9e48a70a1cae8a164f6e6bbaa1c6501 SHA-256: 6ae7c13f1bc23bac5f6d298272fb70fc11e2c56cd84f53b3f6b4b7dd9334ec56
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary redirector URL is https://ttraff.cc/pify?keyword=bcg+company+presentation+pdf, which is flagged as malicious. This suggests the document is part of a phishing or scam campaign aiming to direct users to harmful 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.cc/pify?keyword=bcg+company+presentation+pdf
    • http://files.srrlsf.com/uploads/1/3/1/3/131380868/4f04903295aa5.pdf
    • http://files.atasteofdarkvanilla.com/uploads/1/3/1/8/131871467/jasuzozutategevof.pdf
    • http://files.ducksnestdecoys.com/uploads/1/3/1/3/131378975/kosuludovom_suzepi_tenevasa_kulezadugujiwe.pdf
    • http://files.floridafraternalorderofeagles.com/uploads/1/3/2/6/132696210/4644408.pdf
    • http://files.kathleenmcnenny.com/uploads/1/3/0/8/130873908/971a5f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/64075693378.pdf
    • https://cdn.shopify.com/s/files/1/0430/5662/7866/files/10642124676.pdf
    • https://cdn.shopify.com/s/files/1/0434/0059/3557/files/ergot_alkaloids.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/buzano.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/88638319464.pdf
    • https://cdn.shopify.com/s/files/1/0430/9339/3557/files/korok.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/30313489959.pdf
    • https://cdn.shopify.com/s/files/1/0437/1415/0553/files/99793908355.pdf
    • https://cdn.shopify.com/s/files/1/0440/4533/6726/files/2331024105.pdf
    • https://cdn.shopify.com/s/files/1/0430/6780/1749/files/furavumef.pdf
    • https://cdn.shopify.com/s/files/1/0430/9241/0525/files/matura_podstawowa_angielski_gramatyka.pdf
    • https://cdn.shopify.com/s/files/1/0434/0065/9100/files/8504019639.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071b2.bin
d9789ea825f8820a1dafc33741830583aa18a92351c7cbea0c76f6b20412b467		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B2 5384 bytes
font_01_sfnt_off000083ea.bin
5d2fca99950c4e6b537c51859f72007484acd2798f3e2de2deb311104386d46a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83EA 10488 bytes
font_02_sfnt_off0000a7bf.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7BF 4324 bytes

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