Malicious PDF — malware analysis report

Static analysis result for SHA-256 72379faf2b62b85b…

MALICIOUS

PDF

39.6 KB Created: 2020-08-26 00:24:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d235bc62235c51f30026d62d94dbf0e SHA-1: 983c53ec9b0337c68948c310be016e0b2ee99537 SHA-256: 72379faf2b62b85bf3978b240d3f34475cc298d43a88a5ef453b033e0df8c0aa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for a "magical butter machine manual". The presence of numerous other PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content.

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/pify?keyword=magical+butter+machine+manual
    • http://files.astronomynz.org/uploads/1/3/2/6/132695629/kewemulawika_mizofuvavu_mozar_repokefoga.pdf
    • http://files.michellemcdanielportfolio.com/uploads/1/3/1/4/131410479/gevegepapanedex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0179/1132/files/vilisenolaxowuzovole.pdf
    • https://cdn.shopify.com/s/files/1/0432/9275/4076/files/vesoragel.pdf
    • https://cdn.shopify.com/s/files/1/0436/1856/6306/files/buderus_logamax_plus_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5565/files/67507763831.pdf
    • https://cdn.shopify.com/s/files/1/0433/5153/9861/files/48071690318.pdf
    • https://cdn.shopify.com/s/files/1/0430/3912/9751/files/physiology_book_ak_jain.pdf
    • https://cdn.shopify.com/s/files/1/0437/1320/0282/files/41452386722.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/669297692.pdf
    • https://cdn.shopify.com/s/files/1/0432/8990/3259/files/minitakewarerisuvali.pdf
    • https://cdn.shopify.com/s/files/1/0434/3939/0872/files/comparison_between_dna_and_rna.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_off00005e2a.bin
3e0a193122dd562a2ca70864d1348a9554f143df5946af6f640fd2f0b57baf05
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2A 5180 bytes
font_01_sfnt_off00006fa4.bin
49541d54b81079f1b3eaa3e86567917e15bd8ab56451f45cba144ad185107b34
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA4 10120 bytes