Malicious PDF — malware analysis report

Static analysis result for SHA-256 41ff4ded4b38918c…

MALICIOUS

PDF

67.6 KB Created: 2020-08-24 17:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7836610bb1e13e01f3d96c48fa2b6e5 SHA-1: 2c32ba6b42b0a9386182de3bc949daf219df5ef2 SHA-256: 41ff4ded4b38918c92aa970f7416167ea944c1f4411ad5f7b6292c31f0bc4b41
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a known malicious domain, ttraff.com, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains the same lure text and URLs found in the heuristics, indicating an attempt to trick users into clicking the malicious link. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to improve search engine ranking for malicious content.

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=meant+to+be+video+song+free
    • http://files.hbcnow.org/uploads/1/3/0/7/130739099/vixipedofunitedifilo.pdf
    • http://files.creepettaway.com/uploads/1/3/0/9/130969172/6995082.pdf
    • http://wubedova.bennettwellness.com/uploads/1/3/1/6/131606289/0971987c37f82.pdf
    • http://finulaluw.bergonawire.com/uploads/1/3/1/4/131407067/rawonebod.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/webamorevuxip.pdf
    • https://cdn.shopify.com/s/files/1/0439/2773/2379/files/daily_planner_template_free_printable.pdf
    • https://cdn.shopify.com/s/files/1/0433/0301/0468/files/fomijizorabuvixila.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2677/files/wexegipugikidesewetuwomot.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/physical_geography_of_asia_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/88256811898.pdf
    • https://cdn.shopify.com/s/files/1/0434/0698/3335/files/curso_de_bambuterapia.pdf
    • https://cdn.shopify.com/s/files/1/0429/9273/0275/files/6069379026.pdf
    • https://cdn.shopify.com/s/files/1/0429/4184/1575/files/tomifegagamotubutox.pdf
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/48019374097.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2023/files/traditional_vs_alternative_assessment.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/lobur.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009ea8.bin
fb8e86199109dbd7741fa21e2935d84bd53eae319e250e53cb5964ba698e134e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EA8 5248 bytes
font_01_sfnt_off0000b09c.bin
877f60617ce72377f44f048de4ff9f80172652df458e3a1c87ea2aea92f25b87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB09C 15700 bytes
font_02_sfnt_off0000e1d0.bin
b82df6633e890811049b460d49bc579ec337a888aa8dac6e763e1a06cb4f5608		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D0 18864 bytes

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