Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d7d59bef87d16d3…

MALICIOUS

PDF

56.8 KB Created: 2020-08-20 10:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d6c3063c5c7e7e0ce6ef6ec5e2f9791 SHA-1: 038a99fc3aa9067325ec0d9f0b943f7c24f44abf SHA-256: 5d7d59bef87d16d3371d1b273be3826dfe8f1c7d1dc127f9d24d8fc5a5897b24
162 Risk Score

Malware Insights

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

This PDF file contains embedded links that point to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, appears to be a lure for a 'golfshot plus user guide'. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=golfshot+plus+user+guide
    • http://files.earlyunitedstatescoins.com/uploads/1/3/0/8/130873717/bokivaxititizuj-tijiputubegol-salarujubiza-sasozedin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8170/3319/files/2466569715.pdf
    • https://cdn.shopify.com/s/files/1/0433/3800/6686/files/70378606582.pdf
    • https://cdn.shopify.com/s/files/1/0440/8036/5720/files/precalculus_larson_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/1684/5469/files/sabazorugerubunanodubegol.pdf
    • https://cdn.shopify.com/s/files/1/0440/0028/0734/files/68774673069.pdf
    • https://cdn.shopify.com/s/files/1/0437/9292/4821/files/65040173260.pdf
    • https://cdn.shopify.com/s/files/1/0431/5296/5792/files/euv_lithography_asml.pdf
    • https://cdn.shopify.com/s/files/1/0432/3134/6856/files/73989928275.pdf
    • https://cdn.shopify.com/s/files/1/0438/4122/4861/files/angular_template_viewchild.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/epidural_analgesia_in_labour.pdf
    • https://cdn.shopify.com/s/files/1/0428/3547/6636/files/49940455103.pdf
    • https://cdn.shopify.com/s/files/1/0431/5349/0071/files/jojituluvagizajovud.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/beautiful_things_lyrics.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_off00009288.bin
102d822ea96ab9879d04759c90aa2d8d4408e9c440d4115df15f119f9af6c8c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9288 5124 bytes
font_01_sfnt_off0000a3f3.bin
b294b642bee995e71900c84c4d2633a71b8facc46b730ecf6fff73de2719de4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3F3 15620 bytes

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