Malicious PDF — malware analysis report

Static analysis result for SHA-256 7897907e1daf5a24…

MALICIOUS

PDF

47.5 KB Created: 2020-08-04 21:36:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 494eff5545dc939d59a5faa7bff4898a SHA-1: d6ecb6d2548d3efb87d4ca28529ed90b357390c4 SHA-256: 7897907e1daf5a24c665065561670253438570e32558b9ec7b9d9d77229fe50c
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Shopify domains, suggesting an attempt to create a link farm for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. No scripts were extracted, but the presence of embedded URLs and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic strongly indicate a phishing or redirection attack.

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=caterpillar+generator+service+manual+pdf
    • http://files.bluesystem.ca/uploads/1/3/0/8/130814430/buzeno.pdf
    • http://files.peacefulthoughtstherapy.com/uploads/1/3/2/7/132740804/walutobap.pdf
    • http://files.jonathanshorter.com/uploads/1/3/1/6/131636725/91207d96d7ad.pdf
    • http://files.momofallcapes.com/uploads/1/3/1/3/131379205/0f2c0b1d62078.pdf
    • http://files.topdogservicedogs.org/uploads/1/3/2/6/132681012/samotibavogi-gefajib.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0141/3785/files/61387337167.pdf
    • https://cdn.shopify.com/s/files/1/0430/8867/4967/files/ribetonadipixuvagazafe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1350/4150/files/newijedukamerakideserax.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdf
    • https://cdn.shopify.com/s/files/1/0435/6007/5427/files/62333327857.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6568/files/81589673546.pdf
    • https://cdn.shopify.com/s/files/1/0437/0412/3557/files/kuxoxekuwapoxobusuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/2749/6087/files/21210932338.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/6003/files/madisepumetaterenakujo.pdf
    • https://cdn.shopify.com/s/files/1/0444/3645/5591/files/d_d_monster_manual_3._5.pdf
    • https://cdn.shopify.com/s/files/1/0435/6797/2515/files/90072824531.pdf
    • https://cdn.shopify.com/s/files/1/0432/5723/3576/files/zakirinumusugaragibamix.pdf
    • https://cdn.shopify.com/s/files/1/0439/4627/9080/files/salmeterol_davis.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_off00007a82.bin
5621cff62fa23babd9d7d3ab0eef2fdf4731d85dfb8843bf570bb01f1fc88296		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A82 5440 bytes
font_01_sfnt_off00008cf3.bin
e61781c30795aeafec24c833be5621b1b1a465adb5a2ff6225fed4d96ca0a2d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF3 10364 bytes

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