Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e82688dd9fcb9de…

MALICIOUS

PDF

49.4 KB Created: 2020-08-18 18:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df41f464d00e89f31675e5da7dbcb590 SHA-1: c8a892cfc75030c827babc917cebf22e6f79b726 SHA-256: 5e82688dd9fcb9dec04ece251cef7c689f305580b2d02eb37e89fbbb399e2817
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://ttraff.com/pify?keyword=the+fifth+wave+imdb+parents+guide', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF links, reinforcing the idea of a content-driven lure.

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=the+fifth+wave+imdb+parents+guide
    • http://files.katyjunkremoval.com/uploads/1/3/0/7/130740625/2798966.pdf
    • http://files.sofafoundation.org/uploads/1/3/1/3/131384127/8503099.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/2013/2257/files/84920919195.pdf
    • https://cdn.shopify.com/s/files/1/0437/4996/5985/files/51610828507.pdf
    • https://cdn.shopify.com/s/files/1/0432/5769/2315/files/22412082116.pdf
    • https://cdn.shopify.com/s/files/1/0429/8076/9951/files/8208964901.pdf
    • https://cdn.shopify.com/s/files/1/0434/5767/5421/files/lagafadonubezo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/lunukawu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9658/8967/files/dukewisulu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61238086127.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0987/files/vawidutikefotakufipot.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/85780448178.pdf
    • https://cdn.shopify.com/s/files/1/0428/6647/5174/files/73709552833.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007512.bin
55514b61bc91291c681f14a7be7b30c01eef7d0d83be7cc623ffef5faa23200c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7512 5436 bytes
font_01_sfnt_off00008774.bin
2db43f9fa173f265187c5746b624cbd935234089bfdbcbafa6806328866ceea4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8774 10392 bytes
font_02_sfnt_off0000ab07.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB07 4324 bytes