Malicious PDF — malware analysis report

Static analysis result for SHA-256 18e6d36694e8e902…

MALICIOUS

PDF

56.7 KB Created: 2020-08-06 13:45:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5c4dcd852cd3c58770674a38cda944c SHA-1: 1928bf07c5aeb0071a2719273bf2a2d30d469e0f SHA-256: 18e6d36694e8e90213ccdee65b9b681b383e6a35cc5870c6690191d244dbe543
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic identifying it as a link farm pointing to redirector infrastructure. The primary malicious URL, 'https://ttraff.cc/pify?keyword=l+anti+oedipe+capitalisme+et+schizophr%25C3%25A9nie+pdf', is designed to redirect users, likely to a phishing page or to download a secondary payload. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs supports the attack pattern.

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=l+anti+oedipe+capitalisme+et+schizophr%25C3%25A9nie+pdf
    • http://files.crystalcoastmagazine.com/uploads/1/3/0/7/130739542/ea6e6443f32c.pdf
    • http://files.ekshrine.com/uploads/1/3/1/3/131384660/vozisawaliromo.pdf
    • http://jogeta.cremedelacremecakery.net/uploads/1/3/0/7/130739615/5c9b85812705.pdf
    • http://files.islingtontherapy.net/uploads/1/3/1/8/131871621/ruvipolo.pdf
    • http://files.thestagecraftagency.com/uploads/1/3/0/8/130873846/tedufokegasukow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7737/6936/files/84954729987.pdf
    • https://cdn.shopify.com/s/files/1/0435/4198/7479/files/kinudotewej.pdf
    • https://cdn.shopify.com/s/files/1/0431/4306/9858/files/97182518833.pdf
    • https://cdn.shopify.com/s/files/1/0430/8559/4775/files/mujawunarasenirin.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/kuvagosijusirikadu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6146/1670/files/demorujodajaveleliwaloze.pdf
    • https://cdn.shopify.com/s/files/1/0435/3556/4949/files/9287791488.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/noda_restaurants_in_charlotte_nc.pdf
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/56399925340.pdf
    • https://cdn.shopify.com/s/files/1/0438/9568/5288/files/witches_cauldron_witchery.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/cracked_ios_apps.pdf
    • https://cdn.shopify.com/s/files/1/0428/5536/6822/files/wma_to_mp3_converter.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_off00009881.bin
ac62a401b1706a6229341278af4b322f751509838f4e19bd1c20a733de22c343		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9881 5528 bytes
font_01_sfnt_off0000aae8.bin
94136f41a768b45c060f96f0ca05b1c021e77d80b7b2ac92fb5db62c075bc175		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAE8 12688 bytes

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