Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5a89822e19c0ce…

MALICIOUS

PDF

41.9 KB Created: 2020-08-06 19:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0885a28c6b25d85e3b5b80cc3a9fadf8 SHA-1: 5d1b253b38a3c5731b57d12ee35c3659f2e9a48f SHA-256: be5a89822e19c0cee59e77ece08924d0a35e57898ee30a0a600b1c5a8c987d03
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is used to lure users into downloading potentially unwanted software or malware. The document body contains text related to 'Wondershare PDF Editor' and the tool used to generate the PDF, wkhtmltopdf, suggesting a deceptive 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=wondershare+pdf+editor+getintopc
    • http://files.oshogalleriaoregon.net/uploads/1/3/0/7/130739839/xabizududa-vozufo.pdf
    • http://files.qualitypianolessonsmusicstudio.com/uploads/1/3/1/3/131398134/01854cdb84097.pdf
    • http://files.troop11mp.org/uploads/1/3/0/8/130814057/fumimazijer_rurixuv_dikovagitolara_lajovabawam.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/wamapetiwililelabozug.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/89582475927.pdf
    • https://cdn.shopify.com/s/files/1/0429/7228/3033/files/the_everything_thyroid_diet_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/6155/8944/files/39016695459.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/64426516223.pdf
    • https://cdn.shopify.com/s/files/1/0438/1406/0189/files/main_features_of_metaphysical_poetry.pdf
    • https://cdn.shopify.com/s/files/1/0437/7129/7943/files/pepopapi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9187/7283/files/lojosagefi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7829/5450/files/vegirapa.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/xazidaponor.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/1077697959.pdf
    • https://cdn.shopify.com/s/files/1/0432/2105/7700/files/57942554316.pdf
    • https://cdn.shopify.com/s/files/1/0432/4986/0765/files/vulotojawiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7863/1072/files/43891425639.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_off000066a4.bin
fd4ca87c2d46e80af922809568648c492cf8ef0d094e94e0933632ec9b52cce1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A4 5396 bytes
font_01_sfnt_off0000790f.bin
446d40bc85d5eec2a22c34ad33d7510598be00ea9f96acee20c9233a40e750b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x790F 9764 bytes

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