Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad337baf0362df2…

MALICIOUS

PDF

41.5 KB Created: 2020-08-08 12:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 415ae480df3a7280b99702df8627e6e5 SHA-1: e1c1dd6313f8a297b11378362111804a734ff528 SHA-256: 5ad337baf0362df2ced502c2d72fdba64af798888bfba5025c1976cf0e610bed
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to seemingly benign Shopify URLs, but also includes a critical link to a known malicious redirector at 'ttraff.com'. This suggests a link farm or SEO manipulation tactic to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of numerous links and the redirector indicate a likely attempt to lead the user to a malicious site, potentially for phishing or malware delivery.

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=animals+matching+worksheets+pdf
    • http://files.rgcgymnastics.org/uploads/1/3/1/3/131384709/tenifumadamafotu.pdf
    • http://dokikomid.splashsteamboat.com/uploads/1/3/1/4/131453133/fezad.pdf
    • http://files.mariannezarzana.com/uploads/1/3/0/7/130739696/redulog.pdf
    • http://files.beckyradwaydanceprojects.com/uploads/1/3/0/7/130775435/gevemile_pobikov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4018/6268/files/addressing_modes_of_8086_microprocessor.pdf
    • https://cdn.shopify.com/s/files/1/0432/3917/8399/files/86713653112.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8165/files/45427207516.pdf
    • https://cdn.shopify.com/s/files/1/0437/3879/2085/files/content_type.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/joxiwitotivabigapewegabe.pdf
    • https://cdn.shopify.com/s/files/1/0428/2066/5510/files/seoul_metro_map_chinese.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38746106010.pdf
    • https://cdn.shopify.com/s/files/1/0441/3738/2040/files/68045107762.pdf
    • https://cdn.shopify.com/s/files/1/0428/0690/2950/files/25943683979.pdf
    • https://cdn.shopify.com/s/files/1/0432/9704/6696/files/virigotebonumofenizuxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/4681/4374/files/gafide.pdf
    • https://cdn.shopify.com/s/files/1/0436/0319/8116/files/reduce_file_size_in_kb_online.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_off0000630d.bin
bd42e471f39e680630923820a89f36ec05d84cd525309457146b9f73316e1144		 pdf-font-stream PDF embedded font (sfnt) at offset 0x630D 5712 bytes
font_01_sfnt_off00007660.bin
073a7f585c183cae988f8965b403cbaa282ce25dbe70907244553c2a842bb8b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7660 10136 bytes

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