Malicious PDF — malware analysis report

Static analysis result for SHA-256 1889f9c1e249b965…

MALICIOUS

PDF

34.1 KB Created: 2020-09-01 04:27:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23934343fcbd65a80de61442ae058115 SHA-1: ba1ed8cd583d38587af23a9ff3ba59e819057b94 SHA-256: 1889f9c1e249b965737fe71c89d28f60e51a84bfa1842beabc42716f20250251
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick users into visiting malicious infrastructure. The presence of a large number of links, many to Shopify, indicates a potential SEO poisoning or link farm tactic to obscure the malicious destination.

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/wix?keyword=nccn+guidelines+for+locally+advanced+breast+cancer
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/2073490079.pdf
    • https://cdn.shopify.com/s/files/1/0432/8541/4056/files/banalofow.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/adelante_dos.pdf
    • https://cdn.shopify.com/s/files/1/0432/2761/1295/files/zugoporadevutula.pdf
    • https://cdn.shopify.com/s/files/1/0437/8286/5047/files/multiple_sclerosis_treatment_guidelines_2018.pdf
    • https://cdn.shopify.com/s/files/1/0430/6544/2457/files/nomutu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1013/0073/files/58061919617.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/47171602999.pdf
    • https://cdn.shopify.com/s/files/1/0430/9758/7861/files/nujiso.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9880/files/70011049231.pdf
    • https://cdn.shopify.com/s/files/1/0433/4728/0026/files/76808594398.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6636/files/padabugijo.pdf
    • https://cdn.shopify.com/s/files/1/0438/4433/7824/files/10460933950.pdf
    • https://cdn.shopify.com/s/files/1/0432/5471/0427/files/teoria_del_lenguaje_musical_ediciones_si_bemol.pdf
    • https://cdn.shopify.com/s/files/1/0438/0455/7469/files/chiltons_manuals.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_off0000464f.bin
7281b8be13cf8117678ce104d8409aa6e91e8664baae43ab3e02e41b63d57436
pdf-font-stream PDF embedded font (sfnt) at offset 0x464F 5460 bytes
font_01_sfnt_off00005906.bin
a806d54c656cb836660092ecd8bdb35e1d547329fc5f3f4968653c7538d00157
pdf-font-stream PDF embedded font (sfnt) at offset 0x5906 9992 bytes