Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca76f82310917f4e…

MALICIOUS

PDF

42.2 KB Created: 2020-08-19 22:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 823a24d2b8a89f46f22a8fa419554210 SHA-1: 411b080f57e81d3fb603a46b0377b0dbd02a640a SHA-256: ca76f82310917f4e9655567c50b2a0335b4d570cb15f3affc41187eda878dd04
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 Shopify. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=bsf+full+form+slang'. This suggests the document is designed to trick users into clicking through a chain of links, ultimately leading to malicious content. 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=bsf+full+form+slang
    • http://files.girlzonedge.com/uploads/1/3/0/9/130969938/1199411.pdf
    • http://gejunedej.bcwawomen.com/uploads/1/3/0/8/130873826/wufetefifodow.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/kindle_to.pdf
    • https://cdn.shopify.com/s/files/1/0431/2635/8173/files/4161089942.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1716/files/55198238593.pdf
    • https://cdn.shopify.com/s/files/1/0450/4610/4222/files/dopeliv.pdf
    • https://cdn.shopify.com/s/files/1/0434/7409/2196/files/84736579939.pdf
    • https://cdn.shopify.com/s/files/1/0437/5986/1909/files/dumbest_questions_asked_on_yahoo_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/3437/7377/files/lc_ms_in_bioactivity_screening_and_proteomics.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mobisibat.pdf
    • https://cdn.shopify.com/s/files/1/0428/9059/2422/files/elementary_fluid_mechanics_7th_edition.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_off00005a45.bin
fdeeb6be1a804e807cb194eaa262d6a9f3035658b3efc4bac8103df3345f6425		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A45 5136 bytes
font_01_sfnt_off00006b99.bin
f391dd35efaed05b26d39d37aec1eed06e0a81089434ea3fc8ace6e15dc0aa4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B99 2636 bytes
font_02_sfnt_off000076d2.bin
9e52adf84cf71ab7d572eb1d600f87613e590f30684a087d89c36628dc93a861		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D2 11048 bytes

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