Malicious PDF — malware analysis report

Static analysis result for SHA-256 afbf1ae9b56cce30…

MALICIOUS

PDF

41.0 KB Created: 2020-08-22 22:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66cbe98c5bb90b7a77c583e001ee27d4 SHA-1: 65b2f4b6d3610747a2bad4ff652132336fa6b88b SHA-256: afbf1ae9b56cce30b9f0e340b4eb50b3daf9309ffbf8a8d6b3039c8abee319af
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=hyperlink+google+sheets+app'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to Shopify domains hosting other PDFs. The document body, though heavily obfuscated, also contains the redirector URL and several other PDF URLs. This suggests a campaign to distribute malicious content or conduct phishing by leveraging a redirector to obscure the final 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/pify?keyword=hyperlink+google+sheets+app
    • http://sutulonil.cjnyc.net/uploads/1/3/0/7/130776485/rulupivojup.pdf
    • http://fiwube.getfedconcepts.com/uploads/1/3/1/4/131409236/6958630.pdf
    • http://files.stemfutureleaders.com/uploads/1/3/1/4/131453127/ramidepemiruzato.pdf
    • http://gosat.coronetclub.org/uploads/1/3/1/3/131383478/nizitirurik.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/wukotajaxodenazelevaxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/fatizuleg.pdf
    • https://cdn.shopify.com/s/files/1/0431/8121/1802/files/16228302806.pdf
    • https://cdn.shopify.com/s/files/1/0432/4704/2715/files/bikesobexawoselowukum.pdf
    • https://cdn.shopify.com/s/files/1/0435/4415/0165/files/pifilekuteduragip.pdf
    • https://cdn.shopify.com/s/files/1/0434/6822/6725/files/35370838091.pdf
    • https://cdn.shopify.com/s/files/1/0435/2363/7402/files/armstrong_ultra_v_tech_80_furnace_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/7754/9726/files/56979107669.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/30747929425.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3077/files/publication_17_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/6033/8586/files/zikadupi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/52962831355.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_off000061ef.bin
352b8cbdccc479d991938230ee542876d0b90f6759f5a34ec2728b6400612720		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61EF 5208 bytes
font_01_sfnt_off0000739e.bin
0e1005460cec0fc17dc2b093d1e255f5baa368f18ae5eda2709d73c4c1520f91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x739E 10468 bytes

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