Malicious PDF — malware analysis report

Static analysis result for SHA-256 414aa5b4ffb878c9…

MALICIOUS

PDF

44.0 KB Created: 2020-08-29 09:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c007fb49af74e7634168a63cac51c2a SHA-1: e569815ad32b34a2e9f80b1673c9c290ba4b4891 SHA-256: 414aa5b4ffb878c9c5e43b0607c9755a93eb091081feefafe7acdaf15e72b136
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc' with a query related to 'beats solo headphones'. This indicates a phishing or scam attempt to redirect users to a malicious site. The document also contains a large number of embedded URLs, many pointing to Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious redirector URL is the primary indicator of compromise.

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=beats+solo+headphones
    • https://cdn.shopify.com/s/files/1/0435/3556/4964/files/tata_sky_online_tv_app.pdf
    • https://cdn.shopify.com/s/files/1/0452/6043/9713/files/alexandra_david_neel_carti.pdf
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/poe_cipher_build.pdf
    • https://cdn.shopify.com/s/files/1/0432/6922/6656/files/arabesque_romanzo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4672/2974/files/25364129868.pdf
    • https://cdn.shopify.com/s/files/1/0447/8284/6109/files/bazigar_novel_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/3275/3829/files/inferno_carolina_crown_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0436/5198/9657/files/ejemplo_de_un_brief_publicitario.pdf
    • https://cdn.shopify.com/s/files/1/0434/2982/2625/files/certified_network_defender_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0438/0635/9713/files/wukutelupujubudibijogaj.pdf
    • https://static.usrfiles.com/ugd/b8c837_362636c542d14cf99d234a49f50086fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_f079c0b2c6c44064abc2c0858a00825f.pdf
    • https://static.usrfiles.com/ugd/b8c837_56832bff5e0b4c5982dfa82bff44cd28.pdf
    • https://static.usrfiles.com/ugd/b8c837_71f563edebbe41209750c9d1d639ab3c.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c559ab6ad0240098e7d9afceb6de721.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_off00006e27.bin
baa9e3883f515817dc3431fa12d088576d11d0cf2e01dc56749f78eebb3be1da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E27 5000 bytes
font_01_sfnt_off00007f1f.bin
2e7c71e62e22fde18571928149de171a89112d7fd14bacd289463786fe27f2a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1F 10708 bytes

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