Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e4c70d4d11933b1…

MALICIOUS

PDF

43.7 KB Created: 2020-08-08 06:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe981b6d4a58fe0f5106ac33ce1abd8d SHA-1: ae91c5b3ba373aba08382cb941dbfa6fc7791207 SHA-256: 4e4c70d4d11933b1f37c9953035087ed6e22b4c3f8d0a9b87ac0cea7232883e4
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'spatial reasoning exercises pdf' and the URL 'https://ttraff.com/pify?keyword=spatial+reasoning+exercises+pdf', suggesting a lure to disguise malicious content. The presence of numerous Shopify-hosted PDF links, some marked as benign and others unknown, indicates a sophisticated link-farming technique to improve search engine ranking and distribute malicious content.

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.com/pify?keyword=spatial+reasoning+exercises+pdf
    • http://sadev.kyspecialolympics.com/uploads/1/3/0/7/130775403/ac24e6b3b2.pdf
    • http://files.midpacificowlrobotics.com/uploads/1/3/1/4/131437474/tadedijowuj.pdf
    • http://files.newyorkstategrandcouncil.com/uploads/1/3/1/4/131437538/bapemo.pdf
    • http://files.tolcenters.org/uploads/1/3/1/8/131858791/jobisibumoli-rumoxadu-bafunu-tajuderilejam.pdf
    • https://cdn.shopify.com/s/files/1/0432/7155/3189/files/xifiwekik.pdf
    • https://cdn.shopify.com/s/files/1/0432/6545/8336/files/architektura_baroku.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/watumizatawukaki.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/dopilomefomaruvulegi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/supernatural_journal.pdf
    • https://cdn.shopify.com/s/files/1/0435/4146/3204/files/70317617166.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/54034354029.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/87757344659.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/novuputiniretukuve.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/jijonezimaxiwapufumiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/7755/7660/files/33144336165.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6160/files/nilupazagajokovowade.pdf
    • https://cdn.shopify.com/s/files/1/0428/5150/0188/files/98736989677.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_off00006b3b.bin
60d782abcac2ccd656377ba82c7f5e882db499cc806608f57498637c1006a063		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B3B 5496 bytes
font_01_sfnt_off00007dff.bin
a3c0b9bb28ee30d28ccfb7854fd2092b512475dbc16fe4120ae3d7437c737bc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFF 10420 bytes

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