Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e5be8b0334a697c…

MALICIOUS

PDF

40.1 KB Created: 2020-08-28 03:17:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 857629821f0787e876b9186a3101f80e SHA-1: 3e9b7cb0fb513aeffd2c0d830ce0cc87c895c082 SHA-256: 0e5be8b0334a697cc4e517c2c50b9fb2e22b5063c6a542626204f48ed393224d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is a strong indicator of malicious intent. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the document's structure and embedded URLs point to a phishing or redirection scheme.

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=twin+peaks+lingerie
    • http://files.clairecoulter.com/uploads/1/3/1/3/131380485/dibusopoda_wefujedit_pomenakijim.pdf
    • http://files.bethelbaptistsumter.org/uploads/1/3/0/9/130969364/pefag.pdf
    • http://files.brokenhartarena.org/uploads/1/3/0/8/130813692/7428ac.pdf
    • http://files.blackrivertraders.com/uploads/1/3/0/8/130814586/dudog_pogapebajod_riruvik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7798/3653/files/kunalagorasase.pdf
    • https://cdn.shopify.com/s/files/1/0431/6620/4066/files/80581770551.pdf
    • https://cdn.shopify.com/s/files/1/0450/3358/6838/files/republica_aristocratica_peru.pdf
    • https://cdn.shopify.com/s/files/1/0459/7897/6423/files/40243465757.pdf
    • https://cdn.shopify.com/s/files/1/0444/1423/8887/files/diplopia_binocular_causas.pdf
    • https://cdn.shopify.com/s/files/1/0436/9947/0486/files/who_is_the_addressee_in_a_letter.pdf
    • https://cdn.shopify.com/s/files/1/0438/3028/0352/files/kamala_das_my_grandmother_s_house.pdf
    • https://cdn.shopify.com/s/files/1/0436/1630/5312/files/62849751735.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/4236808310.pdf
    • https://cdn.shopify.com/s/files/1/0438/8392/1563/files/change_management_tools_and_techniques.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_off00005ecc.bin
22bdd06a4a8dc9e155603309fdcf1e0fc4c5d5d58989f6da387397fc5c051fcb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECC 5092 bytes
font_01_sfnt_off00007040.bin
fb993534c09a20bea6e098d022a5b0eb952dfa448da7d0d2b856889fbb48d098
pdf-font-stream PDF embedded font (sfnt) at offset 0x7040 10436 bytes