Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5cbcaabb275a771…

MALICIOUS

PDF

43.6 KB Created: 2020-08-14 00:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 915e42eb09e1747d9adb50b3266eee71 SHA-1: 56d86a012a0147537567d25aea9c56edda0049cc SHA-256: a5cbcaabb275a771a2257989273cbf03f4d92111f89bafe63dcd06e589a18b0b
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=app+ampere+android'. The document body, though partially corrupted, contains text suggesting an application download lure ('App ampere android'). The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the malicious redirector. No scripts were extracted from this sample.

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.ru/pify?keyword=app+ampere+android
    • http://kusisiran.figsandfeathersfarm.com/uploads/1/3/1/3/131398157/153e8a5a38851a.pdf
    • http://files.jenkatz-buonincontro.com/uploads/1/3/1/3/131383398/kevomamixix.pdf
    • http://files.everyotherthursdaypodcast.com/uploads/1/3/0/7/130740477/ferijoxegogume-loluxizigiwa-mugixi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4438/0578/files/23747096945.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fezusagofetivori.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/19114919119.pdf
    • https://cdn.shopify.com/s/files/1/0440/8567/4149/files/sujuxanufumopemonipem.pdf
    • https://cdn.shopify.com/s/files/1/0431/4624/8358/files/29989861531.pdf
    • https://cdn.shopify.com/s/files/1/0432/9940/5977/files/payday_2_fov.pdf
    • https://cdn.shopify.com/s/files/1/0432/4950/0315/files/wumokazabigokenilexo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/lunetosuwasagu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/59499798082.pdf
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/kezivimiderexim.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_off00006edb.bin
31966bfb05c20bf9091b8cf87c557c311aa40eacb15b0709b37bc22a595987b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDB 4884 bytes
font_01_sfnt_off00007f56.bin
39bc41aadd17bed9d26b6ca301679eb41f28a9afc1e0d9aebb27720631d3d805		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F56 10040 bytes

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