Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e174056a88732cd…

MALICIOUS

PDF

42.8 KB Created: 2020-08-15 04:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bd24e5a6fa5e2fbc3669d55077337b8 SHA-1: 825c6b8517ddf6c85c09f571ac39b556868a0a85 SHA-256: 7e174056a88732cde30682f4e808b76fc6a84d96b0f9eb4fb4f6c5fa23d6b79c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body and embedded links suggest a link farm tactic, likely intended to obscure the true malicious destination. The ML classifier strongly indicated maliciousness, supporting the presence of a malicious redirector.

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.com/pify?keyword=cookie+sheet+organizer+wood
    • http://xuvimej.assiniboiaskatingclub.com/uploads/1/3/1/4/131482952/0236a1b0dbd4e0e.pdf
    • http://files.joesbrookfarm.com/uploads/1/3/1/3/131398059/rowavan_voxomom_sawosuj_pavimenevel.pdf
    • http://wojose.mattiecowherd.com/uploads/1/3/1/8/131857152/jiloveri-vosofajemida-bifijewom-berugatozo.pdf
    • http://files.glassbrookvocal.org/uploads/1/3/0/9/130969402/domirar_boxexanepafaki_besameva_bijiviribugokik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/master_apache_jmeter_from_load_testing_to_devops.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/wulal.pdf
    • https://cdn.shopify.com/s/files/1/0447/0997/0073/files/26572398653.pdf
    • https://cdn.shopify.com/s/files/1/0431/7357/6865/files/tametanexavawo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/zijovojar.pdf
    • https://cdn.shopify.com/s/files/1/0434/7586/1656/files/cirrhose_du_foie_cours.pdf
    • https://cdn.shopify.com/s/files/1/0438/3732/5462/files/32974855023.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/bilamabigabibiduji.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2901/files/78401827505.pdf
    • https://cdn.shopify.com/s/files/1/0437/8794/4094/files/manual_de_calderas_acuotubulares.pdf
    • https://cdn.shopify.com/s/files/1/0433/8132/5987/files/roziruneram.pdf
    • https://cdn.shopify.com/s/files/1/0430/8280/9508/files/3141563262.pdf
    • https://cdn.shopify.com/s/files/1/0434/0816/2974/files/beliw.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4754/files/pexawisa.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_off00005b74.bin
ef99f0d2fd30f53bf382ebe671083c57af7db97efc9622f3d057b26581732132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B74 5072 bytes
font_01_sfnt_off00006cc4.bin
a3b6107c0379ea340cfa226d5309f21f35fd77fb0f14c802953d563d5f1ab7d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC4 10340 bytes
font_02_sfnt_off0000902c.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x902C 4324 bytes

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