Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65712018e31fa97…

MALICIOUS

PDF

46.2 KB Created: 2020-08-29 11:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85d6e30e0787e3867d33db8932840deb SHA-1: d1b7a65c957c1112bf9aa686012338491cb1da9d SHA-256: e65712018e31fa97db9a4ef7f1f9d8f2c5c8012269705505206412e3fe1afd4b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on content delivery networks. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.ru/wix?keyword=first+aid+basic+sciences+pdf`. This suggests the document is part of a link farm or SEO poisoning campaign designed to direct users to malicious infrastructure. 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/wix?keyword=first+aid+basic+sciences+pdf In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/autonics_at8n.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/9965/8914/files/posusizutin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4186/5384/files/tinig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2831/5288/files/fuwofogifawobudojojeratij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/86844335358.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/18f527_ce1d4eddcf7649ad9ee1fbb6bbacc6d0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_ca7bd45308a040af9b29010b968ec1ce.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1475/8293/files/83479354962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2668/5850/files/alif_ba_ta_flash_card.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/allylic_strain.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9649/0655/files/alfabeto_japones_katakana.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000788e.bin
3b03de8603047ac657cf2de7df5883bf2214144d5c601433f21f8d74a9116ca7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x788E 5212 bytes
font_01_sfnt_off00008a47.bin
ee6b502797ae52eaf9d6a6ff1e5b11fde689101148373f26cbbe6c3d2598d94e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A47 10060 bytes

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