Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d41a01ae14b0894…

MALICIOUS

PDF

42.4 KB Created: 2020-08-30 11:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15f34cf0953bc2074f24898bcadb8051 SHA-1: 1f242822566906d0655a6fb5f37b984ad13f050e SHA-256: 1d41a01ae14b0894499f7588e8c4619ca3276a1e4d4389a26a46245c45f9527a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded links, suggesting an SEO poisoning or phishing campaign. The primary malicious URL identified is https://ttraff.cc/wix?keyword=2016+tacoma+trd+off+road. While no scripts were extracted, the sheer volume of links and the ML classifier's high confidence indicate malicious intent.

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=2016+tacoma+trd+off+road
    • https://cdn.shopify.com/s/files/1/0436/7423/9129/files/86250836660.pdf
    • https://cdn.shopify.com/s/files/1/0434/3952/1958/files/nenemusewatodov.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3639/files/segajuxaferivup.pdf
    • https://cdn.shopify.com/s/files/1/0428/5195/8947/files/set_up_icloud_email_address_on_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/0216/6428/files/strength_of_materials_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/xukijadarofutisilesuxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1782/files/35226639957.pdf
    • https://cdn.shopify.com/s/files/1/0430/3002/0247/files/33822900897.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5333afdbc4d48c2979e4d8585a24a4f.pdf
    • https://static.usrfiles.com/ugd/b8c837_e6b032325d904897bf9cf1e87d7ac8a1.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef332902125d44f09dab24f6d572cbe8.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006761.bin
ab5b5c727a8acf6b8a1959e4233602324ce8739347979a1e6c229044de98ea21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6761 5340 bytes
font_01_sfnt_off00007966.bin
ad485c1f0a8c7e3c374e3e2d147813e188f6eb566eaf1baee29f83399babc08c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7966 10420 bytes

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