Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c8fd5cdac994e4…

MALICIOUS

PDF

44.0 KB Created: 2020-08-17 18:11:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c2fe122fc8a634c42e1f9fbfa69ceee SHA-1: 50b0a3de063851b03a1ca3f4adf7999e603e69a3 SHA-256: 07c8fd5cdac994e414c12deb46521f772e1d4d3cb12739c08d105da09f48a861
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body also contains this URL, suggesting an attempt to trick users into visiting a malicious site. The presence of numerous other PDF links, many pointing to Shopify, indicates a potential link farm or SEO manipulation tactic to obscure the malicious intent.

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=limits+questions+and+answers+pdf
    • http://vizokitur.psykotherapist.com/uploads/1/3/1/1/131164462/mojupexeneji.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/bewavudupajuruf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9688/3868/files/82281910885.pdf
    • https://cdn.shopify.com/s/files/1/0433/6209/1163/files/kinematics_worksheet_1_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0439/4575/4792/files/sight_word_bingo_printable.pdf
    • https://cdn.shopify.com/s/files/1/0429/7529/7689/files/www._barbercosmo._ca._gov_license_renewal.pdf
    • https://cdn.shopify.com/s/files/1/0434/0973/5845/files/zadabejejijazune.pdf
    • https://cdn.shopify.com/s/files/1/0430/1661/8145/files/wilarijob.pdf
    • https://cdn.shopify.com/s/files/1/0431/5942/1092/files/fuwisilosolatubemafek.pdf
    • https://cdn.shopify.com/s/files/1/0437/9371/1261/files/74149755448.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8392/files/85849011631.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_off000062d0.bin
a80335f99d676d0facad93b12bdbbb1054c6c8521025ff4e09da95772efebbee
pdf-font-stream PDF embedded font (sfnt) at offset 0x62D0 5312 bytes
font_01_sfnt_off000074db.bin
caa272955cbc1392c6a550ef2d992a180797e6f92b3795fa7d5df32aeec36af5
pdf-font-stream PDF embedded font (sfnt) at offset 0x74DB 15028 bytes