Malicious PDF — malware analysis report

Static analysis result for SHA-256 3428d45706c9b9af…

MALICIOUS

PDF

35.5 KB Created: 2020-08-30 22:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 526e2501060f38d88c6ded5da0da88b7 SHA-1: 2e442d74eedbe8474228df4e06f6e91d9f39dd8f SHA-256: 3428d45706c9b9af44d479be1d4222c3d536b6f7f13ecd009b2e18cc66a7b5ff
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or traffic redirection. Crucially, one of these links, https://ttraff.cc/wix?keyword=devre+teorisi+notlar%25C4%25B1, is identified as a known malicious redirector. The document body, though heavily obfuscated, contains this URL, indicating an attempt to direct users to malicious content. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly suggests a phishing or redirection attack.

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/wix?keyword=devre+teorisi+notlar%25C4%25B1
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5340/8675/files/payday_2_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0439/1282/2952/files/anticoagulantes_clasificacion.pdf
    • https://cdn.shopify.com/s/files/1/0428/2066/5510/files/calcul_d_un_arc_de_cercle.pdf
    • https://cdn.shopify.com/s/files/1/0440/5955/8053/files/vojimavibej.pdf
    • https://static.usrfiles.com/ugd/7d21c0_4b9eb4e151524d3ab10a450d71dc55ca.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7110/files/10610664476.pdf
    • https://cdn.shopify.com/s/files/1/0429/8817/5513/files/guxetigalurobatepixulovi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8469/4175/files/79024170222.pdf
    • https://cdn.shopify.com/s/files/1/0430/4103/0293/files/vomezivimuzuze.pdf
    • https://static.usrfiles.com/ugd/008e52_f6102b7565554c2998d56e6554b63fa5.pdf
    • https://static.usrfiles.com/ugd/12f4eb_cd81dee2849343ce9e9b04af6968ea01.pdf
    • https://static.usrfiles.com/ugd/b8c837_b30317aaa5564d66978070745cb83036.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_bc0647c9f2054edfa2975971d2702399.pdf
    • https://static.usrfiles.com/ugd/850f07_f0eb403dabda44f4aadec7290757e6c9.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_off00004b74.bin
23a36960809179f23ba940dd54318d47b11c11bd6834e5a3cfa7ef05c27b9f7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B74 4772 bytes
font_01_sfnt_off00005bc2.bin
a3d899d6545aa7b8db80297703c8286efd20544679c256e3d415f10994172cf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC2 11224 bytes

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