Malicious PDF — malware analysis report

Static analysis result for SHA-256 1241035ff21862ee…

MALICIOUS

PDF

38.3 KB Created: 2020-09-19 18:13:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f62be5ac5e16f38b3c60ca9b8602b7f SHA-1: 99319a2b2745587f80a50adf8ea0dc998bbf848d SHA-256: 1241035ff21862ee2bca51dc06775de5d8ea88923be0d49abcbc5ff8cf084d09
154 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDFs. One of the primary links, https://ttraff.me/wix?keyword=farberware+crock+pot+manual, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into clicking through to malicious content under the guise of a manual. No scripts were extracted from this sample.

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.me/wix?keyword=farberware+crock+pot+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9415/5169/files/dikeboloxunixijawiwunitek.pdf
    • https://cdn.shopify.com/s/files/1/0463/6157/5579/files/free_handwriting_abc_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0447/4689/9607/files/99288828897.pdf
    • https://cdn.shopify.com/s/files/1/0451/0449/6803/files/14611489496.pdf
    • https://cdn.shopify.com/s/files/1/0459/5403/9967/files/jafiwatazikupugogomoso.pdf
    • https://8ca5f081-ad97-474b-8b69-22083c5a04a5.filesusr.com/ugd/3ce946_9aaf019fc41e4764b15c78acac57364b.pdf?index=true
    • https://38d86348-fbd3-4211-84de-ebcd8c8f7fc5.filesusr.com/ugd/12dc78_993d587f131b4a98810f09c76d9df984.pdf?index=true
    • https://e5f033b1-144c-4c02-a105-ad74f90f6c9c.filesusr.com/ugd/ccf397_7ba961e7f2ad47658a400f82b1f03167.pdf?index=true
    • https://6f978e3d-02c9-4f77-8275-5e9aeb169dbb.filesusr.com/ugd/418e76_3c629a9a3d8e452cac8edd73ceca324b.pdf?index=true
    • 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_off00005513.bin
f362994360dac0bb4f04c7bb4f0bf4da95a45a723af9a1e7b0545233683f50f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5513 5152 bytes
font_01_sfnt_off0000669d.bin
f8f49cac61e2387287339fefb25094bcefe71505b8f25b0940264b1937d26562
pdf-font-stream PDF embedded font (sfnt) at offset 0x669D 11548 bytes