Malicious PDF — malware analysis report

Static analysis result for SHA-256 455390c844d98295…

MALICIOUS

PDF

50.1 KB Created: 2020-08-14 13:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91d0a5de83d364b492dfeaeb6daed18b SHA-1: e8926d71445e2a3d935a78463f4608f1f7e1e104 SHA-256: 455390c844d98295a024f0233cb402565c4b316df95a7317d644628f7d63f6a7
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to benign Shopify domains but one critical link to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains the same suspicious URL, suggesting an attempt to disguise malicious content as a worksheet. The presence of numerous PDF links indicates a strategy to distribute content widely, potentially for SEO poisoning or to obscure the primary malicious destination.

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/wb?keyword=geometric%20mean%20triangles%20worksheet%20pdf
    • http://files.ryanballonlineportfolio.com/uploads/1/3/1/3/131380397/8569208.pdf
    • http://files.danceology.ca/uploads/1/3/0/8/130874257/3f7514213102ea5.pdf
    • http://files.duanebrownlaw.com/uploads/1/3/1/4/131483253/2887604.pdf
    • http://doxozok.summerfry.com/uploads/1/3/1/6/131606201/lilelesajodifaza.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/sivagafasizeki.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/tabofawi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/43876770844.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/80623868724.pdf
    • https://cdn.shopify.com/s/files/1/0432/6345/9496/files/genowimoviridag.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/89406373198.pdf
    • https://cdn.shopify.com/s/files/1/0447/3890/4218/files/micelles_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/demezimepezujutomeripisu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6077/2515/files/kejakejimogupa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4388/9052/files/rockwell_and_brinell_hardness_test.pdf
    • https://cdn.shopify.com/s/files/1/0437/7303/4658/files/causative_form_exercises_b2.pdf
    • https://cdn.shopify.com/s/files/1/0430/5505/5002/files/zasemewibubo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006122.bin
a07bf8786dc10c3a4ca5c2ec98f8280a2ebf845a93261229d82fde149e8c156a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6122 5544 bytes
font_01_sfnt_off000073e6.bin
87b5fe3e492f5d844d23ce2109defebd49f8e724d2077ab22bf0b5c6b4f8f714		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E6 10412 bytes
font_02_sfnt_off000097c2.bin
062f8a7185608a18dbd56baf48eb14c791e3c6ea8866a2ddd6a03467109098f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97C2 16072 bytes
font_03_sfnt_off0000ac61.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC61 4324 bytes

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