Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c8ed0168b7b67d5…

MALICIOUS

PDF

46.5 KB Created: 2020-07-30 04:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: baccc601ad9ce6c47e7489020288146b SHA-1: c0e2bc2b7187c33b8a9284aec183cfbceace51f2 SHA-256: 2c8ed0168b7b67d5f183dc43466b3f7128b86e710df58cb7f4c0e10016fe33cd
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to contain metadata related to a PDF document, likely intended as a lure. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through a large number of seemingly unrelated documents.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=queen+bohemian+rhapsody+piano+cover+pdf
    • http://files.cailenfu.com/uploads/1/3/1/4/131437444/rutez_wubusaxofab_kajali_zuwogor.pdf
    • http://files.blackcanyonpet.com/uploads/1/3/2/7/132712332/6183235.pdf
    • http://files.clintonvolnerphotography.com/uploads/1/3/1/0/131070173/nivenomag.pdf
    • http://files.odundefestival.org/uploads/1/3/0/8/130814581/fad9970defa350.pdf
    • http://files.av-imagineer.co.uk/uploads/1/3/0/8/130813511/nukum.pdf
    • http://files.clintonvolnerphotography.com/uploads/1/3/1/0/13107017
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7485095273.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/84436610348.pdf
    • https://cdn.shopify.com/s/files/1/0432/5795/4467/files/20917472227.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/gigozapex.pdf
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/ribakoxedas.pdf
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/bavave.pdf
    • https://cdn.shopify.com/s/files/1/0438/1959/7981/files/17421397230.pdf
    • https://cdn.shopify.com/s/files/1/0433/1136/6309/files/benag.pdf
    • https://cdn.shopify.com/s/files/1/0435/8438/9275/files/83162853865.pdf
    • https://cdn.shopify.com/s/files/1/0433/6504/0286/files/20781233608.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2934473971.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_off00007787.bin
e6ce11ea3cd182d8dcae993242835d44b9e10c94f4b8b66bfbca4b375bb89159		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7787 5528 bytes
font_01_sfnt_off00008a19.bin
60b081fe4a11ceab399f4359e9b67af52ab4926d6feec17b089ed76f713a7beb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A19 10028 bytes

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