Malicious PDF — malware analysis report

Static analysis result for SHA-256 69dae7b7f5957440…

MALICIOUS

PDF

43.4 KB Created: 2020-08-18 15:24:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84d846e4a06e6cd0b2d4d84309b2f271 SHA-1: d67d2b97a5cb37a997f3b14d9755215ccdc7a5e5 SHA-256: 69dae7b7f5957440e1f312c1a1c137976e5641e159cbecded786435d55a8bb19
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link to 'ttraff.com'. Another critical heuristic indicates a PDF link farm, suggesting an attempt to manipulate search engine results or lure users to malicious sites. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the malicious URL and several benign-looking Shopify URLs, indicating a potential phishing or SEO poisoning 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.com/pify?keyword=android+auto+honda
    • http://gowojex.mrsregion.com/uploads/1/3/2/7/132740435/899174.pdf
    • http://ginede.unityofmonroe.org/uploads/1/3/1/1/131164250/jaduvejixa-gibas-suxoti-penanabowab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/5149/1236/files/74869610087.pdf
    • https://cdn.shopify.com/s/files/1/0435/2566/9028/files/96048005304.pdf
    • https://cdn.shopify.com/s/files/1/0430/0272/4506/files/71288723801.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/39690899279.pdf
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/jukapulejemobamalux.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0657/files/vumadumefurike.pdf
    • https://cdn.shopify.com/s/files/1/0436/9799/5944/files/algebraic_expression_problems.pdf
    • https://cdn.shopify.com/s/files/1/0437/4583/7208/files/32703201452.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_off000061db.bin
9601742981af22975ac62bf1f2efe0b721bb6f4192f8e216d541de7160f34511
pdf-font-stream PDF embedded font (sfnt) at offset 0x61DB 4456 bytes
font_01_sfnt_off000070dd.bin
9e70e06d1f1773a53e71409e27e7a757aa268435bc2b407a8d13df53143efd43
pdf-font-stream PDF embedded font (sfnt) at offset 0x70DD 10024 bytes
font_02_sfnt_off00009331.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x9331 4324 bytes