Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d86c22226932e8d…

MALICIOUS

PDF

43.7 KB Created: 2020-07-29 14:20:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb2c7d423849a6b20c1dc3ab53e2978e SHA-1: c14c4fbb001dd889add2793b880447f1a35ac17e SHA-256: 6d86c22226932e8d695aee74cece0ec4d922a0051feebcd5cb6ffc67a978d004
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The ML classifier also strongly indicated maliciousness. The document body text is heavily obfuscated, but the presence of numerous links suggests an attempt to direct users to external, potentially harmful, content. No scripts were extracted from this sample.

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.cc/pify?keyword=food+test+for+non+reducing+sugar+pdf
    • http://files.rifthppd.org/uploads/1/3/0/8/130873855/781a476cba.pdf
    • http://files.marinwoodturningandcompany.com/uploads/1/3/1/4/131454521/ratikoxujoberu.pdf
    • http://files.cutthecord.us/uploads/1/3/2/3/132303388/doxobobapijon.pdf
    • http://files.nctroop10.com/uploads/1/3/1/6/131636988/11503321d260.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97046042130.pdf
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/gisabogesepiwu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/67299129806.pdf
    • https://cdn.shopify.com/s/files/1/0432/5592/2856/files/57024662488.pdf
    • https://cdn.shopify.com/s/files/1/0434/8814/9654/files/ripodavom.pdf
    • https://cdn.shopify.com/s/files/1/0428/4134/2108/files/kukadodaxobaseg.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/bikobidem.pdf
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/suriwo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/96251251169.pdf
    • https://cdn.shopify.com/s/files/1/0431/9562/9725/files/donajaxulal.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_off00006e6e.bin
fb3add971fc961cda56af9862b9a93bbe998b421536986bf1a002f2a1099711f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6E 5128 bytes
font_01_sfnt_off00007ff0.bin
2de8e714b92416cd72857f4e83b0eb96cd7a98ffe24552ba1f000608e31b79cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF0 9872 bytes