Malicious PDF — malware analysis report

Static analysis result for SHA-256 692965882437924d…

MALICIOUS

PDF

40.0 KB Created: 2020-08-19 04:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f84ef9e02af7aa6d888c2c1f23c996d SHA-1: 354117c02cdfbaf0aebd01d68ecc1260af98f0e1 SHA-256: 692965882437924d5d8ee816d3f6d2c486ac8e0bcaf66e612279d0dfa1ddd1d1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to potentially malicious redirector infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.cc/pify?keyword=genetic+code+table+pdf as malicious. The PDF_SEO_LINK_FARM heuristic indicates a link farm strategy, suggesting the document is designed to drive traffic to external sites. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine a more specific attack pattern beyond link redirection.

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=genetic+code+table+pdf
    • http://files.revrevd.com/uploads/1/3/0/8/130814043/5245986.pdf
    • http://files.pycap.ca/uploads/1/3/1/8/131857152/pamodetu.pdf
    • http://files.sweetsbulgaria.org/uploads/1/3/1/8/131871480/dadozix-bisesebuxasop-rijuvo.pdf
    • http://files.killjoy.info/uploads/1/3/2/8/132816158/444fa6d86d0810f.pdf
    • http://files.qldspruikle.com/uploads/1/3/1/8/131856232/2382f9f46954.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9105/8083/files/fidutataturapupuvinir.pdf
    • https://cdn.shopify.com/s/files/1/0439/4886/7742/files/sony_bm10_bluetooth_music_receiver_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/0740/8290/files/38684797201.pdf
    • https://cdn.shopify.com/s/files/1/0434/4286/4294/files/arma_3_exile_install_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/4615/0039/files/66194719263.pdf
    • https://cdn.shopify.com/s/files/1/0432/3311/6315/files/mimo_beamforming_antenna.pdf
    • https://cdn.shopify.com/s/files/1/0435/1927/9258/files/60144460683.pdf
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/82297776473.pdf
    • https://cdn.shopify.com/s/files/1/0440/4363/2805/files/79134542499.pdf
    • https://cdn.shopify.com/s/files/1/0431/5709/4559/files/consecuencias_del_cambio_climatico.pdf
    • https://cdn.shopify.com/s/files/1/0434/4345/4102/files/92235105097.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_off00005f81.bin
e5a7b008a06161179b1b3382ff0ad5fbd58f430f2a84394dac550a12202e9e96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F81 5044 bytes
font_01_sfnt_off000070c3.bin
1c592fb23035ba3628498ad6cc6ed46e518f45aa8a541d9ad15bde97cefbf64b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C3 10012 bytes

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