Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcf4b09ebb63f63d…

MALICIOUS

PDF

47.0 KB Created: 2020-08-08 10:07:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0fbb842cbe7b22d07def890ca276f6f SHA-1: 66811d2e4b8d9c977895c29d7bf20a77ec248725 SHA-256: dcf4b09ebb63f63d601a9436b810d1623920a7852151b8f943ae8200a43c0985
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.cc/pify?keyword=body+language+reading+techniques+pdf, is identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to 'body language reading techniques pdf'. The presence of numerous external PDF links, many hosted on cdn.shopify.com, indicates a link farm strategy. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=body+language+reading+techniques+pdf
    • http://files.leecountytrackclub.com/uploads/1/3/2/7/132712015/sezovagexu_jepino_fepame_watov.pdf
    • http://files.readingforracquets.com/uploads/1/3/0/8/130814644/8622568.pdf
    • http://files.eatsxm.com/uploads/1/3/1/6/131606331/669884.pdf
    • http://files.nadinebrockel.de/uploads/1/3/2/6/132681356/ec442469dc0.pdf
    • https://cdn.shopify.com/s/files/1/0429/2214/8003/files/split_array_into_chunks.pdf
    • https://cdn.shopify.com/s/files/1/0431/2504/7463/files/xagonisa.pdf
    • https://cdn.shopify.com/s/files/1/0432/4727/2098/files/21620910546.pdf
    • https://cdn.shopify.com/s/files/1/0440/7037/1493/files/25262702066.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/ragugexanituwamowekupo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/suvopekin.pdf
    • https://cdn.shopify.com/s/files/1/0437/5651/9576/files/90932024195.pdf
    • https://cdn.shopify.com/s/files/1/0432/6899/7283/files/22434479256.pdf
    • https://cdn.shopify.com/s/files/1/0429/2080/4518/files/bescherelle_la_conjugaison_pour_tous.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6822/files/63074302769.pdf
    • https://cdn.shopify.com/s/files/1/0438/2556/1757/files/knowledge_encyclopedia_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/9183/5545/files/xelavodibubanuxiralifan.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_off00006b06.bin
f6127384b1d36f9b065d72f303fa6ff3ff8db88767bce84ff99628be77e6847e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B06 5576 bytes
font_01_sfnt_off00007df7.bin
578213b56f6aac40509dc40a94406bd4bece4ea04bf6908614a5420e31c055fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF7 10268 bytes
font_02_sfnt_off0000a0de.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0DE 4324 bytes

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