Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf46faf6fcc585b…

MALICIOUS

PDF

46.8 KB Created: 2020-08-10 15:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a01e9b1be305a5e942730bc528c333d5 SHA-1: f48a5e24cc06304833d8ae7f4d69c09628f133ac SHA-256: 6cf46faf6fcc585be992cb1d3bf37a24914d424ada76e3545db9ecbd1067075e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link disguised as a search result for a specific book, which redirects to a malicious domain (ttraff.com). This indicates a phishing or scam attempt, likely using the document as a lure. The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm designed to obscure the malicious redirector. The ML classifier strongly flagged this PDF as malicious.

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=catechism+of+the+catholic+church+second+edition+pdf
    • http://files.mrflessa.com/uploads/1/3/0/7/130775331/92134.pdf
    • http://files.saltwaterpalette.com/uploads/1/3/1/3/131384098/nagororumejuma.pdf
    • http://files.unboundlifecoaching.com/uploads/1/3/1/1/131163846/8278690.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53607129813.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7483/files/5335879926.pdf
    • https://cdn.shopify.com/s/files/1/0437/1608/3877/files/body_language_advanced_3d_character_rigging_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/1566/6840/files/70457042874.pdf
    • https://cdn.shopify.com/s/files/1/0433/0510/7620/files/vimejixo.pdf
    • https://cdn.shopify.com/s/files/1/0440/0558/9157/files/68768236808.pdf
    • https://cdn.shopify.com/s/files/1/0439/8697/6926/files/gimegozanapapi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/hu_country_code.pdf
    • https://cdn.shopify.com/s/files/1/0431/0600/9255/files/50851747359.pdf
    • https://cdn.shopify.com/s/files/1/0432/3826/0899/files/jonovirapozabuwupumusotup.pdf
    • https://cdn.shopify.com/s/files/1/0435/3848/1320/files/approaches_to_social_research_5th.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_off00007927.bin
44de63abe69233f1da718de73bd09bd3d280537eeae8ff626d5c10fcd6cd13a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7927 5300 bytes
font_01_sfnt_off00008b01.bin
b3f4540cb368146aaebf161508529a5fa9555f25ba17c535b042e761dda2035c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B01 10192 bytes