Malicious PDF — malware analysis report

Static analysis result for SHA-256 937c3212c299be7c…

MALICIOUS

PDF

40.9 KB Created: 2020-08-05 00:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5815ac002b160d883463a712f8f9eac SHA-1: c1e9d76defae50db8d8f42e706a8a967cd4177d7 SHA-256: 937c3212c299be7c448869aac84433036bff0ad5efc1195ef57e76c0a476ae33
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary malicious redirector URL identified. The document body, though partially corrupted, includes the malicious URL and appears to be a lure for 'basic english words with arabic translation pdf'. The heuristic firings confirm the presence of a malicious redirector and a link farm, indicating a phishing or redirection attempt. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=basic+english+words+with+arabic+translation+pdf
    • http://files.bensawyermusic.co.uk/uploads/1/3/2/7/132740218/kelupotamevivok.pdf
    • http://files.ncccspa.org/uploads/1/3/1/4/131437061/nudirup_detaxo.pdf
    • http://files.sweetearthjewelry.com/uploads/1/3/1/3/131380263/libetaxiloxef.pdf
    • http://gesopu.dianeperell.com/uploads/1/3/1/8/131856584/7264739.pdf
    • http://files.treehousetherapies.com/uploads/1/3/0/8/130814258/60b1083c861.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4551/files/35293282768.pdf
    • https://cdn.shopify.com/s/files/1/0440/6447/3253/files/83762175740.pdf
    • https://cdn.shopify.com/s/files/1/0435/1787/0239/files/mapolojes.pdf
    • https://cdn.shopify.com/s/files/1/0431/2963/4970/files/luxara.pdf
    • https://cdn.shopify.com/s/files/1/0438/5603/5990/files/77646803335.pdf
    • https://cdn.shopify.com/s/files/1/0429/1490/6279/files/google_atari_breakout.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/20604720305.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/18607798515.pdf
    • https://cdn.shopify.com/s/files/1/0431/3976/0295/files/emacs_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63529720688.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58580374151.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_off000060e4.bin
93512429097f105463b1abe8948c33cb19780c3b9f0f232ca2c05c33d6c7f892		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E4 5700 bytes
font_01_sfnt_off0000744a.bin
2cf995ff0219f08ae165bf94b1ff20d5f1230a32ffafae9ed5b0dc1a7e8984a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x744A 9964 bytes

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