Malicious PDF — malware analysis report

Static analysis result for SHA-256 13134486244f1d45…

MALICIOUS

PDF

38.8 KB Created: 2020-08-30 22:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2dc6fcb4fc2805d0fd57908ad6349351 SHA-1: a1e6348dbacecd7cf7de73695f53452a1b9feee1 SHA-256: 13134486244f1d45ccbdf2d85dfeb8c481207197073bcb5f2e882b7f890a52e7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and contains a large number of embedded links to other PDF files, suggesting a link farm. One of these links, 'https://ttraff.cc/wix?keyword=thermaltake+xaser+iii+ebay', points to known malicious redirector infrastructure. The presence of this malicious link indicates an attempt to redirect users to harmful content, likely for phishing or malware distribution.

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=thermaltake+xaser+iii+ebay
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7424/1187/files/jajet.pdf
    • https://cdn.shopify.com/s/files/1/0429/4357/8278/files/bixexowufigutedisinu.pdf
    • https://cdn.shopify.com/s/files/1/0461/5421/9683/files/50748284021.pdf
    • https://cdn.shopify.com/s/files/1/0448/3439/0178/files/blackberry_z30_latest_autoloader.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2221ff361a9486cbb9e7216a1bcb6bd.pdf
    • https://static.usrfiles.com/ugd/f46427_48c5edfef45f473ba3add9e55f02ae8e.pdf
    • https://static.usrfiles.com/ugd/93c935_c79ba530a23740a696dbc16fcd8483df.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/quiz_games_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/5438/9665/files/dna_structure_and_replication_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/sesagoruxuwumomevopub.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/95178858681.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_off00005a4c.bin
7dd0e0825889ab8206d893d9666d0174cac4aeecada1fefafeea18645b968dc4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A4C 5248 bytes
font_01_sfnt_off00006c04.bin
304be0e0eb4df75c68c723f7f32ebf0933cbff8360219e131194ab01019f6ad4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C04 10224 bytes