Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d3f96b7f02b150…

MALICIOUS

PDF

39.9 KB Created: 2020-09-17 10:18:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cb430afb59ec3c77e7ed88a94eb26e0 SHA-1: 3db273f3957f4022fed7636e0bd8bcadb847898b SHA-256: 72d3f96b7f02b1508a2b6f8da6104fc6fa90b2bdbe0b112743a237a65d3f030b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of links to external PDF files, many of which are hosted on suspicious domains and appear to be part of a link farm designed to manipulate search engine results. One critical heuristic indicates the PDF links to known malicious redirector infrastructure, specifically directing users to 'ttraff.link' with a keyword related to technical documentation. This suggests the document is a lure to drive traffic to malicious sites, likely for phishing or malware distribution.

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.link/wix?keyword=fujitsu+halcyon+manual+auto+switch+error
    • http://files.tameraboundsforcitycouncil.com/uploads/1/3/1/4/131437987/vadaxamigazojowe.pdf
    • http://lunabum.takeoffyourseatbelt.com/uploads/1/3/1/4/131437595/wekasuvaguliko_gitaro_netorofedug.pdf
    • http://files.chaosdragonboats.com/uploads/1/3/0/8/130814216/julel_furujuxuxu.pdf
    • http://kasejuwi.trackyourcompany.org/uploads/1/3/2/6/132682076/sewezifijajes.pdf
    • http://lelosa.creeksideband.com/uploads/1/3/1/4/131407316/sibirupole.pdf
    • http://files.adbsupply.com/uploads/1/3/2/8/132815979/tetogekuvexejazomes.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1966/5561/files/nepezexixaxupomun.pdf
    • https://cdn.shopify.com/s/files/1/0436/5654/4409/files/mitekabirorijar.pdf
    • https://cdn.shopify.com/s/files/1/0429/1664/2975/files/bapetujoke.pdf
    • https://cdn.shopify.com/s/files/1/0476/9234/9606/files/75264063035.pdf
    • https://bbb3ae4b-dac3-4e09-8f29-133453fa7042.filesusr.com/ugd/8aba0c_efa8b6fd9c3847f89bb4534b958b25d4.pdf?index=true
    • https://601902d8-7791-44b2-ae9b-9c689fc41e9b.filesusr.com/ugd/28146e_e9100513ec4b4403ad8fe91fcb836c4d.pdf?index=true
    • https://4741cec5-3439-4f09-a6bd-5b5ee736a892.filesusr.com/ugd/debdc1_e880a19417834bb59545855ea7e78685.pdf?index=true
    • https://bbae1ba6-47a5-4f94-b4df-4f7311c0c071.filesusr.com/ugd/d38238_51442e2b8435430da949bf06cbda7f85.pdf?index=true
    • https://8daffdb7-b95f-4860-865d-fe7ec77ec3c9.filesusr.com/ugd/9058e5_22c4a17998e74fe88f89ca2d681b4fe0.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e8c.bin
8172ccb0157a8c6f8e8ad264216ce4b79b750dd1070988b30bf5b057f74982bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8C 5264 bytes
font_01_sfnt_off00007064.bin
39c6de6afbfa8173a6b858fd2db89875463e77dd33d5ae9b46a2f8d5ec43151d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7064 10044 bytes

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