Malicious PDF — malware analysis report

Static analysis result for SHA-256 645726f4a85c78aa…

MALICIOUS

PDF

40.3 KB Created: 2020-08-10 11:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 899a6537d5c40706a1e9b4e93b36a186 SHA-1: 35e5c862be2e405eaed4482b073699c03de44c8f SHA-256: 645726f4a85c78aa9aefe41e8085713629425f1b31e3f2f24671b6693f95225c
202 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO poisoning tactic to drive traffic to malicious sites. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic suggests the document may also attempt to trick users into executing commands.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=bmp+to+pdf+windows+10
    • http://bimewe.tametracktour.com/uploads/1/3/1/6/131606490/3461606.pdf
    • http://belobeda.jmccormickbennett.com/uploads/1/3/0/8/130814328/nomigitigetaladi.pdf
    • http://files.lyonstownship.org/uploads/1/3/1/4/131437889/6188a90724926.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9032/2335/files/41026845425.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/sanewalibegemopimikebud.pdf
    • https://cdn.shopify.com/s/files/1/0431/3379/6509/files/95328235071.pdf
    • https://cdn.shopify.com/s/files/1/0429/7303/6697/files/dirks_castes_of_mind.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31321710084.pdf
    • https://cdn.shopify.com/s/files/1/0434/6275/4461/files/zapafuxupi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7337/1288/files/risuwaxovo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7595/9973/files/86013702961.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/kifokipo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/22210567618.pdf
    • https://cdn.shopify.com/s/files/1/0432/0080/7074/files/29071025782.pdf
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/wufulekidewexetu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1141/4939/files/11824047644.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_off00005f53.bin
23cdc4201055ff3905523c6ec6b743aaaa9a1603df00ac63c5b613190e8caefd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F53 5184 bytes
font_01_sfnt_off0000710d.bin
0f51fbd9b6d0f9cff9821375add8b552f03ca76f248f8a2c0a8c5daa54f2fd0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x710D 10220 bytes

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