Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2abd73c9ff3c9f3…

MALICIOUS

PDF

43.0 KB Created: 2020-08-07 08:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11a5ce90dbaf3045816742e39211d663 SHA-1: 759f3df015723130b1cdb6e33cb840d80641140a SHA-256: d2abd73c9ff3c9f33b74f95a467755313f56b3bf53096f807ad2f7ff6db5469a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to malicious sites. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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=body+language+joe+navarro+pdf
    • http://pajigul.phemanitoba.ca/uploads/1/3/0/7/130775997/wilugi.pdf
    • http://files.nalinikrishnankutty.com/uploads/1/3/0/8/130874128/mewajuluxojuvafox.pdf
    • http://files.bgcrgparish.org/uploads/1/3/2/8/132814250/074616.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/rowixipe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4919/7472/files/smokey_bones_nutrition.pdf
    • https://cdn.shopify.com/s/files/1/0430/5541/5445/files/pruebas_bioquimicas_e._coli.pdf
    • https://cdn.shopify.com/s/files/1/0437/0900/5978/files/66733823778.pdf
    • https://cdn.shopify.com/s/files/1/0433/6438/4927/files/8732982754.pdf
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/deruripexapa.pdf
    • https://cdn.shopify.com/s/files/1/0434/2192/5525/files/92021956822.pdf
    • https://cdn.shopify.com/s/files/1/0434/4925/4048/files/72195555597.pdf
    • https://cdn.shopify.com/s/files/1/0430/5145/0519/files/practical_intelligence_in_everyday_life_sternberg.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/salil_sawarim_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/4179/1895/files/50493284342.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065d9.bin
45c849a69d92dfe3ef559df7fad492a705e5a706dfbd8b635da6e82348c80f8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x65D9 5320 bytes
font_01_sfnt_off0000781f.bin
346a176f5de77463a8dfe9cba517fe6be73ead090d4bf81da18912add7d5a162
pdf-font-stream PDF embedded font (sfnt) at offset 0x781F 13376 bytes