Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e70cfe09f1495a6…

MALICIOUS

PDF

45.3 KB Created: 2020-08-15 00:21:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6323d88e4e6948537a676d91097569f SHA-1: b37e85aba20ee44c9bc869a619a79e438958fc51 SHA-256: 6e70cfe09f1495a6bcb8fb20fdf63081ec25ee84328905a077b166600890d88d
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL https://ttraff.com/pify?keyword=animorphs+book+one+pdf. This technique is often used to obscure the final malicious destination and evade detection. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is part of 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=animorphs+book+one+pdf
    • http://vikiwerut.seanpatricklong.com/uploads/1/3/1/1/131163635/34cb7b26.pdf
    • http://files.vendelarts.net/uploads/1/3/1/8/131871799/f6419a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0521/2832/files/rogijabaxiremore.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4601/files/9527773861.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6467/files/basibizomaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/8207/1716/files/1972_gmc_jimmy.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/enter_sandman_guitar_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/45923979747.pdf
    • https://cdn.shopify.com/s/files/1/0432/3799/8754/files/85557909341.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72438278193.pdf
    • https://cdn.shopify.com/s/files/1/0433/3040/4502/files/calculus_by_swokowski_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/59984238462.pdf
    • https://cdn.shopify.com/s/files/1/0428/2499/0887/files/25684380706.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_off000074d4.bin
1f6eb281d373b05c44f523fed0724dfa388d0a5eac1b716c1ca384d0403691e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x74D4 5232 bytes
font_01_sfnt_off00008669.bin
5b66ecc29765269e2d42cb4b92fcd08ec2beb044c47f79d96ee222e153933ca9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8669 10120 bytes