Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b02b280d8df210…

MALICIOUS

PDF

53.8 KB Created: 2020-08-24 17:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a87d4bf3382944bb56486aad4aec3e68 SHA-1: 4cd2eed47d8f55292b0e794b305d3a123f0dcf94 SHA-256: a7b02b280d8df21046dbcb44fb7925bd77a02be200e83237ae9305a0ee49880f
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are SEO-optimized and point to potentially malicious redirectors. The primary malicious URL identified is https://ttraff.ru/pify?keyword=canada+elections+platform+quiz, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to the quiz and the malicious URL, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=canada+elections+platform+quiz
    • http://files.aubreyvioleta.com/uploads/1/3/1/3/131378918/getibu_dufusepunevew_sovagoxepix_fononitilefi.pdf
    • http://files.mariebyrdsproul.com/uploads/1/3/0/8/130813458/rorakosinur_zovakenogeno_forebizozulorod.pdf
    • https://cdn.shopify.com/s/files/1/0464/0771/2923/files/amazing_world_of_gumball_full_episodes.pdf
    • https://cdn.shopify.com/s/files/1/0439/1400/2600/files/revobovafijapavejuxowimak.pdf
    • https://cdn.shopify.com/s/files/1/0429/4439/7468/files/69717683892.pdf
    • https://cdn.shopify.com/s/files/1/0432/4163/5997/files/18189288075.pdf
    • https://cdn.shopify.com/s/files/1/0428/2122/2567/files/gamecube_emulator_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/4537/9478/files/zujidej.pdf
    • https://cdn.shopify.com/s/files/1/0429/9181/2767/files/sibigugafe.pdf
    • https://cdn.shopify.com/s/files/1/0435/2317/8656/files/62466263511.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0865/files/15341938255.pdf
    • https://cdn.shopify.com/s/files/1/0432/9819/3566/files/tulimusidu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3976/0285/files/a_sample_of_slime.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8573/files/19806189747.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/puvaj.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_off0000943f.bin
5251c3c6376b979cf7686f438cbba1c55d804aaa6486a26c6ee383994958a21f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x943F 5384 bytes
font_01_sfnt_off0000a67e.bin
7ab4d15a957d389b1bb7acada5ddc5a9c28f464194e7bf516e83729ae351670c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA67E 10444 bytes

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