Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5f66ae104cf74e3…

MALICIOUS

PDF

48.5 KB Created: 2020-08-22 12:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6eac6fbca3db811bf6a575bb5d33956 SHA-1: 3f698e2668da33e59e3c3d52426d7c7238ad7f14 SHA-256: f5f66ae104cf74e3fca3844a9f38273d327d0b58b4f1670fea611c68471eeb26
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is presented within the document body, disguised as a link to an 'instruction manual template'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=instruction+manual+template+with+pictures
    • http://files.vegasvoicelessons.com/uploads/1/3/1/8/131856308/4359346.pdf
    • http://files.patelp.com/uploads/1/3/1/4/131407492/gamojoderoluzufid.pdf
    • https://cdn.shopify.com/s/files/1/0432/9114/8454/files/sesuw.pdf
    • https://cdn.shopify.com/s/files/1/0437/3990/6209/files/zuwunagiwil.pdf
    • https://cdn.shopify.com/s/files/1/0437/6517/0334/files/nipekugugivulexixenawu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6933/files/pasusulafugabej.pdf
    • https://cdn.shopify.com/s/files/1/0429/5340/8675/files/minecraft_how_to_use_github.pdf
    • https://cdn.shopify.com/s/files/1/0439/0843/2027/files/wunatidekofutu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4121/0024/files/jamubipavobewujuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7308/files/administrator_roles_and_responsibilities.pdf
    • https://cdn.shopify.com/s/files/1/0430/3595/1257/files/96773797051.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_off000080c2.bin
dc6654b3486bd67cf9d7f18594d25fea50ca084ba41323c3ae469e1380c1ca31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80C2 5200 bytes
font_01_sfnt_off0000924a.bin
afbd42270865e947b34a4a5d98f45788814a7dc2e5463e370ae4762bebf38257		 pdf-font-stream PDF embedded font (sfnt) at offset 0x924A 10244 bytes

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