Malicious PDF — malware analysis report

Static analysis result for SHA-256 16f9ab87e54e7851…

MALICIOUS

PDF

33.7 KB Created: 2020-09-17 17:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6753c0614861aba383942c7fb96dcc35 SHA-1: b076aa1454fe78e0e284bfaec5c5a48c800e4672 SHA-256: 16f9ab87e54e78510bbb55916ceb4e62451ac3c25d6081bc995c350aa3631741
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which, 'https://ttraff.link/wix?keyword=mvp+garage+door+opener+manual', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain similar URLs and references to a 'garage door opener manual', suggesting a lure to a malicious site. The presence of numerous other links to Shopify, some of which are benign, indicates a potential link farm or SEO manipulation tactic to disguise the malicious redirector.

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.link/wix?keyword=mvp+garage+door+opener+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42820491308.pdf
    • https://cdn.shopify.com/s/files/1/0435/9811/9075/files/purchase_code_maple_18_crack.pdf
    • https://cdn.shopify.com/s/files/1/0436/6221/3273/files/tinker_island_pier_answers.pdf
    • https://cdn.shopify.com/s/files/1/0440/1194/6134/files/50871651575.pdf
    • https://cdn.shopify.com/s/files/1/0431/7940/9568/files/modalidades_discursivas_narrativa.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1861/files/dcig_storage_buyer_s_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/5915/7921/files/60523125949.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8246/files/68556983024.pdf
    • https://cdn.shopify.com/s/files/1/0436/0853/9299/files/ost_beatless_opening_2.pdf
    • https://cdn.shopify.com/s/files/1/0430/5430/1338/files/bodupupivofozi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6495/8879/files/sims_2_pleasantview.pdf
    • https://cdn.shopify.com/s/files/1/0430/9296/7581/files/17213159472.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_off0000469c.bin
2f5e5896fd3136a5801291bc7e84ae6e4d24b44c8da482b2f8f3149bc6f32143
pdf-font-stream PDF embedded font (sfnt) at offset 0x469C 5168 bytes
font_01_sfnt_off00005830.bin
74c9748fbc539f1d402ec60ac8a61058652d54068955e553e75710993a9fb4ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x5830 9996 bytes