Malicious PDF — malware analysis report

Static analysis result for SHA-256 db87dc4d1a969549…

MALICIOUS

PDF

40.5 KB Created: 2020-08-18 17:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bbfb6d3c567c87e330d0d7f9862e96d SHA-1: 37a9e534a2881d83f7e247796e58b0d57b30203d SHA-256: db87dc4d1a969549da9871d1fecc3cbcd5896f41e4f0b9771545a3d713dcbd4a
120 Risk Score

Malware Insights

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

The PDF file contains a "kerning game answers" lure in its document body, which is a common tactic for social engineering. It embeds numerous links, with a critical heuristic identifying a link to a known malicious redirector at `https://ttraff.cc/pify?keyword=kerning+game+answers`. This redirector likely leads to a malicious payload or phishing page. The presence of a link farm heuristic further indicates an attempt to distribute malicious content or manipulate search engine results.

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=kerning+game+answers
    • http://files.southingtonjaycees.com/uploads/1/3/2/6/132695732/6cb116fcb.pdf
    • http://files.kkconstdesign.com/uploads/1/3/1/3/131379591/dutizirawuroboku.pdf
    • http://files.mrscormiersmathclass.com/uploads/1/3/1/6/131607075/bukuvizaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/2285/9943/files/94724960653.pdf
    • https://cdn.shopify.com/s/files/1/0428/2508/9191/files/blood_test_normal_range.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/tosadegiwotetosi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9189/4176/files/vumozito.pdf
    • https://cdn.shopify.com/s/files/1/0431/7170/9092/files/83767559999.pdf
    • https://cdn.shopify.com/s/files/1/0430/8202/3073/files/schizophrenia_nursing_diagnosis.pdf
    • https://cdn.shopify.com/s/files/1/0437/7883/4586/files/inorganic_chemistry_housecroft_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/4213/6476/files/functional_group_interconversion.pdf
    • https://cdn.shopify.com/s/files/1/0454/2418/1416/files/itunes_free_apple_za.pdf
    • https://cdn.shopify.com/s/files/1/0435/9172/9309/files/betadine_24_mg_bula.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8973/files/98147301405.pdf
    • https://cdn.shopify.com/s/files/1/0437/6123/8168/files/46424160778.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_off0000619e.bin
afaa8fc990cb0f739c121cdf96730c711e409b9d05341ca74a31118ff00f48af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x619E 5036 bytes
font_01_sfnt_off000072bf.bin
e4d3eaee273ba17a7e625a7e6610b10efd55725601e87b4ddd913d64a390c9fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72BF 10108 bytes

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