Malicious PDF — malware analysis report

Static analysis result for SHA-256 d80bccb697f6f113…

MALICIOUS

PDF

36.4 KB Created: 2020-08-09 04:44:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07f021cd6a722f894b1f9fcfd62f6eaa SHA-1: a17b7a60187f627f71f2abdf5788639f37933df4 SHA-256: d80bccb697f6f113feb5c5ad35bc12e2802d8bcc8d7f6c0ebd67b768986a2f5b
152 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which likely serves as a gateway to malicious content. The document body, though heavily obfuscated, contains references to the redirector URL and other external PDF links hosted on platforms like Shopify and custom domains. This suggests an attempt to either manipulate SEO or lure users to malicious destinations through a chain of redirects.

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=career+paths+computing+express+publishing+pdf
    • http://files.chinchilla3d.com/uploads/1/3/1/4/131410736/7b8bbab5e0.pdf
    • http://tevixede.deborahshulmanmsw.com/uploads/1/3/1/4/131407406/cc4b9.pdf
    • http://files.parkhillbowlingclub.com/uploads/1/3/2/8/132815154/4047543.pdf
    • http://nukusa.elvesterbc.com/uploads/1/3/0/7/130738731/5815519.pdf
    • http://files.pacref.com/uploads/1/3/1/0/131069860/3123155.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8573/files/xipuru.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6596/files/33798288604.pdf
    • https://cdn.shopify.com/s/files/1/0435/7275/6648/files/83364524104.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32808714247.pdf
    • https://cdn.shopify.com/s/files/1/0429/3830/2627/files/osrs_f2p_range_training.pdf
    • https://cdn.shopify.com/s/files/1/0440/0162/4214/files/67680143045.pdf
    • https://cdn.shopify.com/s/files/1/0434/3080/5669/files/ledamamejisulodiranazapa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3453/3275/files/some_any_something_anything_somebody_anybody_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36281161478.pdf
    • https://cdn.shopify.com/s/files/1/0447/0826/6137/files/wupib.pdf
    • https://cdn.shopify.com/s/files/1/0436/5120/3225/files/ordnance_survey_puzzle_book.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f6d.bin
0918924c75e3f38e1ab99a01b52fd8014625604b06c4b2a8e658513a00cc23d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F6D 5684 bytes
font_01_sfnt_off00006291.bin
96e29824b5ebca802e2ec9440e25e8bf240489080a0fabd1dd44d259944a1470		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6291 9972 bytes

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