Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb65994e274df0a1…

MALICIOUS

PDF

48.7 KB Created: 2020-08-23 07:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e945d03df241ce829a470a8773f737ac SHA-1: e2f23cf0f6d23ef1aae4f9fd52329d65348a67fd SHA-256: fb65994e274df0a1c196e15e16118757a27ff2b73ea26c103ae9bb5af5ecb527
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the same URL, suggesting a deliberate attempt to lure users to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that this is a link-based attack, likely for SEO poisoning or redirecting to further malicious content.

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=arunima+sinha+biography+pdf
    • http://files.buildingwingsstudio.com/uploads/1/3/1/6/131637291/0c9d219b5140.pdf
    • http://vipala.hilarymurphyphotography.com/uploads/1/3/1/4/131406071/vugafuroro.pdf
    • http://ronejub.eaststokesoutreachministry.org/uploads/1/3/1/3/131378776/buzija.pdf
    • http://files.mpchouston.org/uploads/1/3/0/8/130813859/wilafo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vekedexixerokasadoboma.pdf
    • https://cdn.shopify.com/s/files/1/0439/1682/0648/files/i_know_big_sean.pdf
    • https://cdn.shopify.com/s/files/1/0433/0985/8984/files/besaxurokimevuzevaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/9526/1348/files/statistical_tolerance_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3912/files/zikupiwuwewaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/2723/4969/files/39049654480.pdf
    • https://cdn.shopify.com/s/files/1/0440/8298/7173/files/copperknob_alphabetical_line_dance_stepsheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/2530/9604/files/43195254941.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/acidosis_in_cattle.pdf
    • https://cdn.shopify.com/s/files/1/0432/1034/2564/files/matitek.pdf
    • https://cdn.shopify.com/s/files/1/0429/1792/0934/files/72330477044.pdf
    • https://cdn.shopify.com/s/files/1/0450/1949/6606/files/cset_study_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006861.bin
a31f89cc008a52c427b7f27436bef168834542e5aa645e3cbcd678f898ae031a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6861 5652 bytes
font_01_sfnt_off00007b67.bin
7f7983fb08a461f751269444232043e74ae0d13556c6b845e1be9fc4ddc27f9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B67 10868 bytes
font_02_sfnt_off0000a08d.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA08D 16164 bytes

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