Malicious PDF — malware analysis report

Static analysis result for SHA-256 f45e8f25413aeec0…

MALICIOUS

PDF

52.5 KB Created: 2020-08-25 04:39:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3115cece4e53c460fb3f0c0a397341f7 SHA-1: 01e3b1741ca6b7d23b942f69dafc6d313f94e833 SHA-256: f45e8f25413aeec07393103644ff4722c99a619578d2a82f553b2b97b5a01eec
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=ecb+icaap+ilaap+guide', is designed to redirect users to malicious infrastructure. The PDF also exhibits characteristics of a link farm, suggesting an attempt to distribute multiple malicious links or pages. The ML classifier strongly indicates maliciousness.

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=ecb+icaap+ilaap+guide
    • http://saminefop.mikemarksarts.com/uploads/1/3/1/8/131871674/sujez.pdf
    • https://cdn.shopify.com/s/files/1/0447/8962/9079/files/differential_equations_from_calculus_to_dynamical_systems.pdf
    • https://cdn.shopify.com/s/files/1/0432/0270/7615/files/ios_13_beta_installation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0273/files/wakotibazuxil.pdf
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/vefefunedodopulelupimuna.pdf
    • https://cdn.shopify.com/s/files/1/0438/1540/3682/files/new_moon_graphic_novel.pdf
    • https://cdn.shopify.com/s/files/1/0431/8206/3778/files/english_grammar_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/susizelogofe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30036161276.pdf
    • https://cdn.shopify.com/s/files/1/0428/4229/2390/files/63485957869.pdf
    • https://cdn.shopify.com/s/files/1/0435/1095/6196/files/ralamolopilibixer.pdf
    • https://cdn.shopify.com/s/files/1/0432/3383/7224/files/24767844791.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000091c3.bin
503b1ccab5c884f3092458221af54a2d03cbdaf552695938ba0e1839782814de
pdf-font-stream PDF embedded font (sfnt) at offset 0x91C3 5064 bytes
font_01_sfnt_off0000a302.bin
653dbc624a505fdabaef3f4f93f96f3a288e82faab66c289bfe21db61f4acae4
pdf-font-stream PDF embedded font (sfnt) at offset 0xA302 10020 bytes