Malicious PDF — malware analysis report

Static analysis result for SHA-256 0067a9dace80de19…

MALICIOUS

PDF

33.8 KB Created: 2020-08-17 13:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f6595c4842416e6ac1b1e329c3226b1 SHA-1: e42001b84710b9d42b41b9ac3310bd60eca90fe2 SHA-256: 0067a9dace80de199fb758677f5a72c094386335dd42753f0e0806d47693bdde
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by a machine learning classifier and contains numerous embedded links, including one pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to distribute malicious content or engage in phishing. The primary malicious URL identified is https://ttraff.com/pify?keyword=apel+cooper+pdf.

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=apel+cooper+pdf
    • http://files.ijumpsportsmedia.com/uploads/1/3/0/8/130874101/nesozug.pdf
    • http://momaputu.piedaterrenyack.com/uploads/1/3/1/6/131606577/tuxamob.pdf
    • http://files.siochantafarm.com/uploads/1/3/0/9/130969370/6523947.pdf
    • http://files.bocesta.net/uploads/1/3/1/3/131383763/vigevijemomotamali.pdf
    • http://sewatu.totalsolutionscomm.com/uploads/1/3/0/7/130738546/gozikibedagulig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81988232477.pdf
    • https://cdn.shopify.com/s/files/1/0429/2509/7126/files/xeliri.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/naduz.pdf
    • https://cdn.shopify.com/s/files/1/0435/9208/9759/files/72243380587.pdf
    • https://cdn.shopify.com/s/files/1/0437/3587/5745/files/understanding_business_nickels.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/25894684822.pdf
    • https://cdn.shopify.com/s/files/1/0435/6499/0632/files/84894667097.pdf
    • https://cdn.shopify.com/s/files/1/0433/1021/9432/files/xugipozuxumadide.pdf
    • https://cdn.shopify.com/s/files/1/0441/2204/6616/files/befotajalupago.pdf
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/fawipukip.pdf
    • https://cdn.shopify.com/s/files/1/0437/3259/8938/files/6562820360.pdf
    • https://cdn.shopify.com/s/files/1/0439/4981/8024/files/arizona_corporation_commission_annual_report.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_off000048ec.bin
5c5a255ab3479f6017590e7712b675aeab372a1429696ba2e7240d23138abd53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48EC 4752 bytes
font_01_sfnt_off0000591f.bin
d0c52cece68263488313a3b84a627f0fc4b320ae73d79452104f38e40cb86573		 pdf-font-stream PDF embedded font (sfnt) at offset 0x591F 9944 bytes

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