Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbb8d96debacce9d…

MALICIOUS

PDF

40.2 KB Created: 2020-07-28 11:30:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 374890a22d8f5c65ebd96cb47bc1474b SHA-1: 24194910d00ca05193a2dbe5b87ffb37c107ef83 SHA-256: cbb8d96debacce9d562daa09a057e30c17901d78732b2399be09ded754013bcc
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, suggests a lure related to 'Manitoba health annual report'. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it's designed for malicious redirection.

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.com/pify?keyword=manitoba+health+annual+report
    • http://files.faithonfireministries.org/uploads/1/3/2/7/132740723/60c269735b3e7d4.pdf
    • http://files.shopragjunkie.com/uploads/1/3/1/3/131383493/3789959.pdf
    • http://files.makeupbytessmiller.com/uploads/1/3/1/8/131856409/ruzewa-morebese-binoram.pdf
    • http://files.releasemystress.co.uk/uploads/1/3/1/3/131398362/5bd8362246815.pdf
    • http://files.makeup
    • https://cdn.shopify.com/s/files/1/0435/4523/1509/files/23325872992.pdf
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/15538828540.pdf
    • https://cdn.shopify.com/s/files/1/0429/7218/4732/files/17932722971.pdf
    • https://cdn.shopify.com/s/files/1/0434/4945/0663/files/54988320783.pdf
    • https://cdn.shopify.com/s/files/1/0429/4747/7667/files/62536731817.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5676/files/gugutubebivuwelinuri.pdf
    • https://cdn.shopify.com/s/files/1/0432/0795/0495/files/robofupixopevewonik.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8841/files/59351382383.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/10607246434.pdf
    • https://cdn.shopify.com/s/files/1/0430/0124/9955/files/linurulilejorageju.pdf
    • https://cdn.shopify.com/s/files/1/0433/1972/2152/files/nomeneviz.pdf
    • https://cdn.shopify.com/s/files/1/0437/9649/6544/files/xuwafijasewobofozotame.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8770/files/jezusolofenara.pdf
    • https://cdn.shopify.com/s/files/1/0434/8946/0376/files/56538422025.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_off00006042.bin
e6200447bb6c299d4bab8bb728845d5f76d3390611bf0114d8aa213dff136a4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6042 4756 bytes
font_01_sfnt_off0000705c.bin
872e9e03da1e251710349e27729ed63c976f7130f2d4c9f984fafec7c99545af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x705C 10296 bytes

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