Malicious PDF — malware analysis report

Static analysis result for SHA-256 7001fa57b5eb3d4b…

MALICIOUS

PDF

41.0 KB Created: 2020-08-19 03:29:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 092c3b3ad52aba7bdd9e6734215c6727 SHA-1: 69a90a248b4a3f364d2eb8c8be4d99a3121ac7aa SHA-256: 7001fa57b5eb3d4bf32ef58219ae37caae173bf58484a971792379f309bda3a7
154 Risk Score

Malware Insights

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

This PDF document contains numerous links, many of which point to external PDF files hosted on Shopify. One prominent link, disguised as a '3d printer parts manual', redirects to malicious infrastructure at 'ttraff.cc'. The ML classifier strongly indicates maliciousness, and the presence of many SEO-optimized links suggests a link farm or phishing attempt. No scripts were extracted, but the document's structure and embedded URLs are indicative of a phishing or redirection campaign.

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=3d+printer+parts+manual
    • http://nusipel.teresastrachanwoventextiles.co.uk/uploads/1/3/1/4/131452884/2288515.pdf
    • http://files.lockhartnoonanchiropractic.com/uploads/1/3/1/6/131607131/peguke-nuzud-galetibe-nepovawalaze.pdf
    • http://files.gtcintheburg.com/uploads/1/3/1/6/131637178/fofowetiluxa.pdf
    • http://files.gloucesterunitingchurch.org/uploads/1/3/2/6/132681233/jafotu.pdf
    • http://fivejonu.homehealthbettercare.com/uploads/1/3/2/6/132682659/6473653.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/balasaheb_shinde_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/8319/2738/files/90610705586.pdf
    • https://cdn.shopify.com/s/files/1/0435/9805/3539/files/tevezusetegezejetox.pdf
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/oss_bss_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/9101/6347/files/basel_3_norms.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/38390491306.pdf
    • https://cdn.shopify.com/s/files/1/0438/8680/5147/files/bridal_hairstyle_images.pdf
    • https://cdn.shopify.com/s/files/1/0432/5788/8936/files/paxibeleji.pdf
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/17968147361.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_off00006209.bin
3fb344cce2dd59e099f7264b178edd223458219f1dfff883cbc56592994b4635
pdf-font-stream PDF embedded font (sfnt) at offset 0x6209 5172 bytes
font_01_sfnt_off00007381.bin
122afb8fd16778e6c603a0cee4282e157bc3767e25a026333cb73bd3bdb72144
pdf-font-stream PDF embedded font (sfnt) at offset 0x7381 10596 bytes