Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a792896292154fb…

MALICIOUS

PDF

41.6 KB Created: 2020-08-03 03:47:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4461934acef703256eed7e3674f40e01 SHA-1: 73da4b660139e25022af63986d35346964460d7b SHA-256: 7a792896292154fbec13b631ed796e94ec44916f5c099deb686bea386c06465d
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, specifically `https://ttraff.com/pify?keyword=haynes+repair+manual+online+free`. The document body also contains this URL, suggesting an attempt to trick users into clicking it by impersonating a repair manual. The presence of numerous other PDF links further indicates a link farm or SEO manipulation tactic. No scripts were extracted, but the malicious redirector is a high-confidence indicator of malicious intent.

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.com/pify?keyword=haynes+repair+manual+online+free
    • http://files.mcauslanmaltinganddistilling.com/uploads/1/3/1/6/131637606/62036b614e.pdf
    • http://files.sehasedona.org/uploads/1/3/1/3/131383754/rutapomotafav.pdf
    • http://files.williamhern.com/uploads/1/3/1/3/131398097/4003391.pdf
    • http://files.justrocktoowoomba.com/uploads/1/3/1/6/131606256/ae5a089a6ebc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9322/0766/files/66135091420.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/50486457092.pdf
    • https://cdn.shopify.com/s/files/1/0432/8567/6192/files/gapijularazexi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4501/1112/files/jamawe.pdf
    • https://cdn.shopify.com/s/files/1/0434/7265/0397/files/mokizavoluxedojukijataja.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nagexonulelaxefirulilona.pdf
    • https://cdn.shopify.com/s/files/1/0437/9593/9488/files/icom_706_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71135401618.pdf
    • https://cdn.shopify.com/s/files/1/0432/9707/9460/files/90586201977.pdf
    • https://cdn.shopify.com/s/files/1/0433/4750/9416/files/vojuv.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_off0000650f.bin
7d54e6514e410db5d3e0dec67e1f9e4eb7ca09ae44520f83d7609add4c54f1fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x650F 5112 bytes
font_01_sfnt_off00007667.bin
45cf3d8a455debb561892ac59848db54852d7c6cc3ff58e054aa0158fd2ba76e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7667 10260 bytes