Malicious PDF — malware analysis report

Static analysis result for SHA-256 24d59d1b743e4d36…

MALICIOUS

PDF

49.0 KB Created: 2020-08-04 11:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccbf7dca6e67454083279327369e8c64 SHA-1: ede41117f74478173dc41720b6e559eed787e075 SHA-256: 24d59d1b743e4d361a8b34f0a9c0b5f017e2e86fef5c8950c920b1ebef034bcb
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=atomic+habits+pdf+amazon', suggesting a lure related to popular books. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be directing users to malicious sites via these links.

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.com/pify?keyword=atomic+habits+pdf+amazon
    • http://files.cencalproperty.com/uploads/1/3/1/6/131606125/7bb5b2a30d.pdf
    • http://files.bruinjewelry.com/uploads/1/3/0/7/130739769/8525303.pdf
    • http://files.wendywangauthor.com/uploads/1/3/1/4/131454297/wagafo.pdf
    • https://cdn.shopify.com/s/files/1/0438/6563/7019/files/griffiths_quantum_mechanics_2nd_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0436/7931/8166/files/14291612268.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/mowidogofe.pdf
    • https://cdn.shopify.com/s/files/1/0435/1416/7450/files/448540145.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/muwevopatenuvaleforatawa.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4134/files/magic_jack_rip_off.pdf
    • https://cdn.shopify.com/s/files/1/0434/3513/1046/files/xiwaxuxijokuranujazevediw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tavolotifejenirogamofiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/rapagojiwabusuxajexiwi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31082235151.pdf
    • https://cdn.shopify.com/s/files/1/0430/4309/4677/files/85552304847.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_off000074a9.bin
3d62423a4bd30a0e210d6776bf9f1962120499784effdaef2225a8ed3104e167		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74A9 5116 bytes
font_01_sfnt_off000085e7.bin
253c0424e287d1d5d30fb586ecc0e79effd159f8383d7da781e4f5f2cd8b663c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85E7 10352 bytes
font_02_sfnt_off0000a940.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA940 4324 bytes

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