Malicious PDF — malware analysis report

Static analysis result for SHA-256 60dbb835350192fa…

MALICIOUS

PDF

42.9 KB Created: 2020-08-24 09:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6506d6d2034e2a7cc411c8dc9f3c3acf SHA-1: 466ccf60f882a6bee40487dac97c2d9a918f9e30 SHA-256: 60dbb835350192fa6694ffffad4401e13a68524ffd4a240e2af3e7717f8f0fc7
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs that point to a known malicious redirector, which is designed to lead users to further malicious content. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to manipulate search engine results or distribute content broadly. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

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.ru/pify?keyword=xamarin+forms+bindableproperty.+create+example
    • http://kodiveb.omosparish.org/uploads/1/3/0/9/130969205/wameve.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7940/1632/files/38001168407.pdf
    • https://cdn.shopify.com/s/files/1/0433/6707/1894/files/dalunajamekepivub.pdf
    • https://cdn.shopify.com/s/files/1/0430/6137/9221/files/movement_sensed_automatic_door_opening_system.pdf
    • https://cdn.shopify.com/s/files/1/0429/7244/6873/files/viraxizun.pdf
    • https://cdn.shopify.com/s/files/1/0428/6359/1590/files/dovufizewuxazewudipibuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/9541/5189/files/67428738502.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1058/files/cub_cadet_1864.pdf
    • https://cdn.shopify.com/s/files/1/0433/2548/9305/files/cellular_respiration_pogil_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/noves.pdf
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/66690324947.pdf
    • https://cdn.shopify.com/s/files/1/0439/0102/6459/files/94946857800.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/19275302051.pdf
    • https://cdn.shopify.com/s/files/1/0439/7072/3998/files/cirrhose_dcompense.pdf
    • https://cdn.shopify.com/s/files/1/0437/8735/4270/files/46806171736.pdf
    • https://cdn.shopify.com/s/files/1/0441/0825/1288/files/76972270566.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_off00005e6a.bin
75083e9e448847355911f963863b8979ba088adfdf68c6c3a9544bb749ac32b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E6A 5620 bytes
font_01_sfnt_off00007175.bin
270c628dfd851bb39270b2cb4a948b8b2bfd7fbea1d3fdc2b69cf9fe900a1119		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7175 14156 bytes

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