Malicious PDF — malware analysis report

Static analysis result for SHA-256 9725d182d609c5ad…

MALICIOUS

PDF

53.7 KB Created: 2020-08-26 09:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d78443ee18d1e9d7237b3badbbd15d1d SHA-1: 9f948d702615ed275579fc772e9f027047a54a9d SHA-256: 9725d182d609c5adf2689ac3e46177c02bc17922b86f8659171beb50fc0f94f0
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=neil+degrasse+tyson+books', suggesting a lure related to popular science topics to entice clicks. The presence of a large number of external PDF links further indicates a link farm or redirection strategy. No scripts were extracted, but the PDF structure and link analysis strongly suggest a malicious redirection attempt.

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=neil+degrasse+tyson+books
    • http://files.35thavenuebaptist.org/uploads/1/3/1/6/131637570/lerugepa.pdf
    • http://files.sandiegotranslationcenter.com/uploads/1/3/1/3/131398547/8f8868c9f313f5.pdf
    • http://files.walthamchangemaker.org/uploads/1/3/0/7/130776158/linefivutap_bebajat_piwewipovemu.pdf
    • http://kapeked.gaiabamman.com/uploads/1/3/0/8/130814328/sediwexir.pdf
    • https://cdn.shopify.com/s/files/1/0431/0627/1394/files/komokabibibipotiwupe.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5797/files/76106256036.pdf
    • https://cdn.shopify.com/s/files/1/0434/1812/4445/files/rafobakajivafu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/66567175212.pdf
    • https://cdn.shopify.com/s/files/1/0437/5756/8151/files/curriculum_guide_in_health_2019.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0787/files/23683228572.pdf
    • https://cdn.shopify.com/s/files/1/0432/3537/7307/files/waxafalog.pdf
    • https://cdn.shopify.com/s/files/1/0440/4166/6710/files/74384122532.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065f5.bin
a1188557ad4bcad56035bded2b3a8a6d23332253ee5e675e461ee2c7d95b97f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F5 5056 bytes
font_01_sfnt_off00007735.bin
573f6e5cc715652d6a52f8ce49d99ad28a58211eaf8f3c398ff69f6b9b07b27f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7735 9864 bytes
font_02_sfnt_off00009944.bin
d16e730c949cf70eda2f17c9a979456d88bfc1e70a5747692f69c0d3e7b824fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9944 20092 bytes
font_03_sfnt_off0000bb71.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB71 4324 bytes

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