Malicious PDF — malware analysis report

Static analysis result for SHA-256 9edf398fbdca9982…

MALICIOUS

PDF

43.4 KB Created: 2020-07-31 05:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db7b0ebdbdb88af8fb6fd9ade221a631 SHA-1: 30fc34c5337d4ace38af566ba4a538d666fbaaad SHA-256: 9edf398fbdca99825e58b409d8a8e3d4c6dcdd1a29906e9058578e662e9fadda
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Ahmed deedat books pdf bangla' and 'wkhtmltopdf', suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to distribute malicious content.

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=ahmed+deedat+books+pdf+bangla
    • http://files.mustangsbasketball.com/uploads/1/3/0/7/130776150/72582.pdf
    • http://files.swimteamcotesaintlucaquatics.com/uploads/1/3/2/8/132815220/sewezetujovavo_magatenijapu_vagaduxewunuja_womuz.pdf
    • http://files.indigoowlboutique.com/uploads/1/3/1/4/131407705/vumupaxok_powaturaxoko_leduwikovod.pdf
    • http://files.897788976207812023.com/uploads/1/3/1/3/131383575/f4516abe7e4d1c3.pdf
    • http://files.mustangsbasketball.com/upl
    • https://cdn.shopify.com/s/files/1/0430/2841/4618/files/89012630984.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2277/files/dutuvi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/43082367687.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nubizasijimowedemo.pdf
    • https://cdn.shopify.com/s/files/1/0438/1786/1280/files/bajabudodez.pdf
    • https://cdn.shopify.com/s/files/1/0430/7497/7945/files/bojodelakixilareratase.pdf
    • https://cdn.shopify.com/s/files/1/0430/8484/1124/files/paxaposemifulidofasevi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/vejofobutopesa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/nevufereto.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8375/files/taruja.pdf
    • https://cdn.shopify.com/s/files/1/0430/8720/0418/files/sikolageboxuxaxu.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_off00005970.bin
49d2f31666d3478f8f1f83c441a4fd53c9f16401d06878207f1ab293d64fc7c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5970 5292 bytes
font_01_sfnt_off00006b47.bin
412bc9a83f36767a0ad66a3e45576ee76f42a03c882b782b770dcd0d81ed2079		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B47 6016 bytes
font_02_sfnt_off00007eac.bin
9eea1c2f035f9952b4eb112288478473ab5677738b668790da0475775c153745		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAC 9704 bytes

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