Malicious PDF — malware analysis report

Static analysis result for SHA-256 995c643d96501e87…

MALICIOUS

PDF

56.0 KB Created: 2020-08-14 09:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a0a50c8e2d4416d20c779a54729760e SHA-1: 45a22d1505c67c1b6ed20f1ff4e55c3dd0e088b8 SHA-256: 995c643d96501e8776a1fbcf27aa43aa29c3d9e2d77330796f3fe637cbabe138
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wb?keyword=12%20week%20bodyweight%20workout%20plan%20pdf'. This indicates the document's primary purpose is to trick the user into visiting this URL. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to obscure the malicious destination. No scripts were extracted from this sample.

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.cc/wb?keyword=12%20week%20bodyweight%20workout%20plan%20pdf
    • http://zojelet.allisonmariereyes.com/uploads/1/3/0/7/130738732/nepirosazas.pdf
    • http://guvamig.princetonrescue-edu.com/uploads/1/3/1/4/131438003/c9bc1eb.pdf
    • http://files.symphonyofhawaiianbirds.com/uploads/1/3/1/3/131381658/6440541.pdf
    • http://tenoli.rootedforpurpose.org/uploads/1/3/0/7/130775350/1048306.pdf
    • http://files.be-sharp.co/uploads/1/3/1/4/131406036/a2b7bc638e25.pdf
    • https://cdn.shopify.com/s/files/1/0438/5928/0022/files/4208830068.pdf
    • https://cdn.shopify.com/s/files/1/0433/9492/4694/files/cattle_production_and_management.pdf
    • https://cdn.shopify.com/s/files/1/0429/4947/6518/files/jezobufamitanugemefuraj.pdf
    • https://cdn.shopify.com/s/files/1/0434/9696/4261/files/5902324548.pdf
    • https://cdn.shopify.com/s/files/1/0437/1401/9496/files/motikixulanakozumet.pdf
    • https://cdn.shopify.com/s/files/1/0437/7070/8125/files/agriculture_resume_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5301/4423/files/mtg_objective_zoology_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/22224912624.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/wow_patch_notes_7._1.pdf
    • https://cdn.shopify.com/s/files/1/0433/0130/6526/files/63076946667.pdf
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/jakuvabarasos.pdf
    • https://cdn.shopify.com/s/files/1/0434/7704/1304/files/79395931033.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_off000085d1.bin
1bb1e45b897b8e760bcf4c95630cca61b9bbc526c1b8130a45e23fb2546b5f18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85D1 5612 bytes
font_01_sfnt_off00009905.bin
64a22eedac503ffd8ab0f16c272747546b5a032fbef95d14c33cfc2fbcff34e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9905 10480 bytes
font_02_sfnt_off0000bd24.bin
028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD24 16312 bytes

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