Malicious PDF — malware analysis report

Static analysis result for SHA-256 41d61032754f4989…

MALICIOUS

PDF

45.9 KB Created: 2020-08-04 23:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7a8061003395e22a48117a8ee02df31 SHA-1: b2fdafa435f05952933d9822b6217f4a860a31ff SHA-256: 41d61032754f49892c72e928229175b8aaabc66ac0153389730aae611780141c
154 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a malicious redirector, specifically linking to a URL known for malicious redirection. It also hosts a large number of external PDF links, many hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute content broadly. The embedded URL points to 'ttraff.ru', which is flagged as a malicious redirector. The document body contains text related to 'cae exam tests pdf' and the malicious URL, indicating a 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=cae+exam+tests+pdf
    • http://files.venicebakery.co/uploads/1/3/2/6/132681836/2813118.pdf
    • http://gidol.bajasharkdiving.com/uploads/1/3/0/8/130874422/xazugazupo.pdf
    • http://files.naturesriches.com/uploads/1/3/0/8/130874085/duvozivip-pixikopufujab-gafukuxosonemuk-baduvu.pdf
    • http://files.socialworkfootprints.org/uploads/1/3/0/8/130813134/gosetuk-setiveforobuk.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7776/files/1429117877.pdf
    • https://cdn.shopify.com/s/files/1/0436/5352/9753/files/lobupepamofugo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/6624477642.pdf
    • https://cdn.shopify.com/s/files/1/0434/3680/2204/files/dilawabopojedewaje.pdf
    • https://cdn.shopify.com/s/files/1/0434/3031/4133/files/93774446706.pdf
    • https://cdn.shopify.com/s/files/1/0433/6209/1167/files/bass_guitar_jazz_scales.pdf
    • https://cdn.shopify.com/s/files/1/0432/9707/9460/files/bomufojadujuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/gta_5_the_mission_has_been_disrupted.pdf
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/71057821639.pdf
    • https://cdn.shopify.com/s/files/1/0437/4170/8453/files/birejeratoleg.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19463184481.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuxopikuxoxixu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/renesezebewovimijekuvo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2990/6079/files/top_producer_8i.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_off00007608.bin
1ec7ee321884715488cb38c1180fb42be63d82eed834b02cf2cb873cd198b3e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7608 5032 bytes
font_01_sfnt_off00008721.bin
928360481617c77cbf6dfdc1562b45569ba5c20d7b266adc516103ef3c3bf2d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8721 10300 bytes

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