Malicious PDF — malware analysis report

Static analysis result for SHA-256 e197424540208d47…

MALICIOUS

PDF

46.4 KB Created: 2020-08-19 17:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a3b43d8c706a1bb24296d9b95908940 SHA-1: eb491e0b4bab5157a129325ce7209ac522ea2cb3 SHA-256: e197424540208d47b9c17b73177aab556b7f97ee7963b3b20b0fff0d86ea7752
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of the primary links directs to a known malicious redirector, ttraff.ru, which is likely used to distribute further malicious content or phishing pages. The document body contains garbled text but also includes the same malicious URL, suggesting it's an intended part of the 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.ru/pify?keyword=cinemavilla+malayalam+movies+free
    • http://files.kofcstarofthesea.com/uploads/1/3/1/3/131379594/dawujatotodusinitif.pdf
    • http://files.mjsfireandsecurity.co.uk/uploads/1/3/1/4/131437702/bda4abd8f6823b.pdf
    • http://files.world-magician.com/uploads/1/3/1/4/131452735/metox.pdf
    • http://sexov.brrclub.com/uploads/1/3/1/0/131070805/4729039.pdf
    • https://cdn.shopify.com/s/files/1/0433/4351/1706/files/mysql_date_format.pdf
    • https://cdn.shopify.com/s/files/1/0453/2230/5691/files/been_vs_gone.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0541/files/36188804619.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7266/files/katolimewofafazawupozokar.pdf
    • https://cdn.shopify.com/s/files/1/0433/9784/1054/files/52764498475.pdf
    • https://cdn.shopify.com/s/files/1/0434/1425/7815/files/agneepath_1990_dialogues.pdf
    • https://cdn.shopify.com/s/files/1/0432/6594/9862/files/digumafirelobuvuxako.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7880/files/kugamovuxafef.pdf
    • https://cdn.shopify.com/s/files/1/0432/7361/7576/files/how_to_disable_graphics_card.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/7585277652.pdf
    • https://cdn.shopify.com/s/files/1/0431/9952/9121/files/conservation_of_energy_problems_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1079/files/5th_generation_cephalosporin.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/jenagekevu.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_off00007883.bin
bd1a0ed88440e4807f8e21262589e18d47cb67eab8182bbccf34b19ff5d398ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7883 4980 bytes
font_01_sfnt_off0000895e.bin
9186db1539fa2737c7ab4a366077588336bb017d6dc283eb04c8877774e95b22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x895E 10152 bytes

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