Malicious PDF — malware analysis report

Static analysis result for SHA-256 b576d209899db124…

MALICIOUS

PDF

48.1 KB Created: 2020-08-09 01:15:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c5b0a3246e0034dfd396c6e378c35b9 SHA-1: 3f2ed1efeb586c1da99a366880a26abaf9bcd5a7 SHA-256: b576d209899db124d62fe3794920db0b4279d3828d7fad83f6d55695700851fe
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=que+es+un+astrolabio+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The PDF also contains a large number of external links, suggesting a link farm or SEO poisoning tactic. No scripts were extracted from this sample.

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=que+es+un+astrolabio+pdf
    • http://files.longheathchurch.org/uploads/1/3/0/7/130739747/9809153.pdf
    • http://nogogego.bloomcreations.ch/uploads/1/3/0/8/130814058/1344735.pdf
    • http://files.hcfcorp.org/uploads/1/3/1/8/131856353/8675567.pdf
    • http://files.islandparkpreservationcoalition.org/uploads/1/3/1/6/131606262/nopavifagejupabu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/microsoft_it_academy_certification_roadmap.pdf
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/english_vocabulary_with_bangla_meaning_for_ielts.pdf
    • https://cdn.shopify.com/s/files/1/0430/1130/9719/files/81022463550.pdf
    • https://cdn.shopify.com/s/files/1/0431/0525/5577/files/34195852083.pdf
    • https://cdn.shopify.com/s/files/1/0430/7596/0985/files/cafe_latte_shakeology_recipe_calendar.pdf
    • https://cdn.shopify.com/s/files/1/0440/7132/1752/files/30938546929.pdf
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/rifem.pdf
    • https://cdn.shopify.com/s/files/1/0438/7612/2779/files/the_strength_training_anatomy_workout_volume_ii.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/kepupadosuva.pdf
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/xinalanunojemafirezus.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/waderivopo.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_off000067d1.bin
4e8525a4d4c472321780e5255e751ef04234a780911c04b423acb503091fd0a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x67D1 5236 bytes
font_01_sfnt_off000079a1.bin
49018fe967e6bdb7b77929c93708ab1c5ab2a4b915014b44388e4cfd5bde8166
pdf-font-stream PDF embedded font (sfnt) at offset 0x79A1 12092 bytes
font_02_sfnt_off0000a087.bin
1778fc52d5c2b0fd07c2129c38f6efdf636d1c9d98383f35cca422a15452e714
pdf-font-stream PDF embedded font (sfnt) at offset 0xA087 6700 bytes