Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c95db37db58dc6c…

MALICIOUS

PDF

55.4 KB Created: 2020-08-17 01:15:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b3ef6baee80337e4a7132d566b4f07a SHA-1: dce19f218febc03f91b7b36a22c8bd26255bc1fb SHA-256: 8c95db37db58dc6cef1d5c17ee3f83391b3b6ca1b08151f7603e0138f002ba64
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of external links, many pointing to domains that host PDF files, suggesting a link farm or SEO abuse tactic. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=research+in+progress+report'. The document body, though heavily obfuscated, contains this URL, indicating the document's primary purpose is to redirect users to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=research+in+progress+report
    • http://desuvolu.carolinaspecialtyproducts.com/uploads/1/3/2/8/132815028/marilevezifar-gogego-wavuwiwiwe.pdf
    • http://xozer.karinalunatk.com/uploads/1/3/0/7/130738591/kuzimozomizek_boxuzofitiva.pdf
    • http://files.wholesale.fanhubnw.com/uploads/1/3/1/4/131437765/40283f907a40904.pdf
    • http://jibuvides.mission-ready.org/uploads/1/3/2/6/132695531/5187901.pdf
    • http://xazugofu.staceywilk.com/uploads/1/3/1/4/131409090/wexatuwulaji.pdf
    • https://cdn.shopify.com/s/files/1/0433/8899/3699/files/analysing_english_sentences.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/tirewoxadafepuzofok.pdf
    • https://cdn.shopify.com/s/files/1/0436/1116/0738/files/2709544868.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/zawulebineguvuxusesiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/75009505788.pdf
    • https://cdn.shopify.com/s/files/1/0440/6149/1365/files/les_patineurs_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/5393/2966/files/kugusowokilazepigija.pdf
    • https://cdn.shopify.com/s/files/1/0436/6244/2646/files/63633662477.pdf
    • https://cdn.shopify.com/s/files/1/0433/4977/0395/files/95791137824.pdf
    • https://cdn.shopify.com/s/files/1/0429/3358/4028/files/zovogafesejixutodafasiniw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75815848510.pdf
    • https://cdn.shopify.com/s/files/1/0436/5382/4677/files/40445003388.pdf
    • https://cdn.shopify.com/s/files/1/0434/6865/2697/files/html_for_strikethrough.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/
    • https://cdn.shopify.com/s/files/1/04

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009dea.bin
b769dd77778c68884a913567dd8ed8be72c3ee12d7e806c8440c00d174519a28
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DEA 5168 bytes
font_01_sfnt_off0000af7a.bin
a4f5aaf0fe15f3856b36b3e039a4bb505e477e9a8165d16c6ea544072d4f8287
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF7A 9624 bytes