Malicious PDF — malware analysis report

Static analysis result for SHA-256 141baefdbe6ced56…

MALICIOUS

PDF

45.9 KB Created: 2020-08-23 01:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e3045b51d29f3dcd103f4fa3c2f147e SHA-1: ac2208296f11ccd4d05e943feb493820fad3e364 SHA-256: 141baefdbe6ced56cd20cc2bdb313b089c9474e78735a1ee92c0e7350ef93815
162 Risk Score

Malware Insights

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

The PDF contains a link disguised as a "free home monthly budget spreadsheet" that redirects to the known malicious domain ttraff.com. This domain is flagged as a redirector, indicating a likely attempt to lead the user to a malicious payload or phishing page. The presence of a large number of external PDF links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic to obscure the malicious redirector. No scripts were extracted, but the ML classifier strongly indicates malicious intent.

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.
  • 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=free+home+monthly+budget+spreadsheet
    • http://files.sesbaby.com/uploads/1/3/0/7/130776726/napijiduwidunusajit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/gimujijonuzexo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5978/1538/files/xunabirusotoripolatag.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/test_1879eb6a-339e-4d45-a409-571cd94a4742.pdf?v=1594212285
    • https://cdn.shopify.com/s/files/1/0431/1977/1799/files/kilamotivupomutaladiju.pdf
    • https://cdn.shopify.com/s/files/1/0434/5144/9496/files/debitilolimidemuzobusu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nomevorijodasulalo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1797/7504/files/zcoin_masternode_setup_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/lodusabivafanexufuzumolu.pdf
    • https://cdn.shopify.com/s/files/1/0449/8394/3326/files/casting_crowns_who_am_i_chords.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bb2.bin
5814d14a97c83d72f9c550fea03091430e855e0187875f743beb70679f5f42d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB2 5568 bytes
font_01_sfnt_off00006e7d.bin
ee9eca0b3bd7acd136e29f2c04b9eec3ac07d8bbabaf51000bb94211c2be2cc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7D 12044 bytes
font_02_sfnt_off0000952b.bin
975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x952B 16312 bytes

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