Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba8d4de54087cd2…

MALICIOUS

PDF

33.8 KB Created: 2020-08-16 23:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63993be364fdbcfd2afee6d3f6f08538 SHA-1: 71f5ff2ff8613ede0920b395c40d5ea01e83600b SHA-256: 3ba8d4de54087cd293d83b36acac3aeed0cee35939768572c1fb8b60c53ca11c
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 various domains, including a significant number on cdn.shopify.com. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=cb+edit+background+4k'. This suggests the document is designed to act as a link farm, potentially to distribute malware or phish for credentials through the redirector.

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=cb+edit+background+4k
    • http://files.mymagicspoon.com/uploads/1/3/0/7/130739202/gixovitawu.pdf
    • http://files.electroyelizondo.com/uploads/1/3/1/4/131406453/aa384e4c25d0dd3.pdf
    • http://genirew.martachaffee.com/uploads/1/3/1/6/131606490/8b5873.pdf
    • http://files.adolescentidentities.com/uploads/1/3/1/8/131857305/kixit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wawufomujemozinabewa.pdf
    • https://cdn.shopify.com/s/files/1/0430/2723/4969/files/palat.pdf
    • https://cdn.shopify.com/s/files/1/0431/8583/2096/files/facebook_blueprint_exam_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/6111/6064/files/libro_el_cerebro_autista_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/3262/4808/files/manunuj.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/sibomaxuveves.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/resujilatitotativesuxusis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86562581376.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/how_many_graham_crackers_in_a_box.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45292738862.pdf
    • https://cdn.shopify.com/s/files/1/0431/9631/7845/files/filmfare_awards_2020_winners_list_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/9097/4622/files/ad_bc_a_rock_opera.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_off000049d5.bin
9dc26e14936c41a742b064125438b4b78585ef06c5fd0f7bd8cb14af1077a122		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49D5 5092 bytes
font_01_sfnt_off00005b37.bin
99cd17dfdbe97b376c90d56dca72929c179ff88c4646d04fc7da956c6f97ae13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B37 9232 bytes

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