Malicious PDF — malware analysis report

Static analysis result for SHA-256 94feea8fc146af6a…

MALICIOUS

PDF

44.4 KB Created: 2020-08-19 03:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c41fb0d5fe1b7b1f82b536972c12b57 SHA-1: 30c4fe0f60ae7dc60f401c85adf9276d94bc4569 SHA-256: 94feea8fc146af6a38a64b54d3a9c4b34b8547c98ff239c1841d1d21073198ec
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links to other PDF files, a technique often used for SEO poisoning or to distribute malicious content. One of the links points to a known malicious redirector, indicating a malicious intent. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was largely unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=barbie+doll+pc+games
    • http://zovepoma.donboscoyouthincubator.net/uploads/1/3/1/4/131438641/674766.pdf
    • http://files.innerwheeldistrict21.org/uploads/1/3/1/0/131070711/8025081.pdf
    • http://files.arcawa.org/uploads/1/3/1/4/131453588/satufexe.pdf
    • http://pefux.knightsgambitvineyard.com/uploads/1/3/1/6/131606056/fuwomilakalolos.pdf
    • https://cdn.shopify.com/s/files/1/0432/4186/5384/files/techno_gym_treadmills.pdf
    • https://cdn.shopify.com/s/files/1/0428/3275/6902/files/vowisodufojobuwodazu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7922/8837/files/rixopitilit.pdf
    • https://cdn.shopify.com/s/files/1/0432/6404/9318/files/fafal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/wedding_anniversary_songs_kannada.pdf
    • https://cdn.shopify.com/s/files/1/0430/0396/9689/files/66857039362.pdf
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/popedirasujupifi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5340/6618/files/29816232599.pdf
    • https://cdn.shopify.com/s/files/1/0437/8768/1954/files/92030920903.pdf
    • https://cdn.shopify.com/s/files/1/0433/4357/7256/files/24742697131.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_off0000618b.bin
54c4b9d10fd01e14acf804892a961353787570487aef498f63ee871895139441
pdf-font-stream PDF embedded font (sfnt) at offset 0x618B 5184 bytes
font_01_sfnt_off0000731f.bin
aaf730ded412e2dd9d3a086fa0790d473eec876d034df295ed1676bd5ca9ddaf
pdf-font-stream PDF embedded font (sfnt) at offset 0x731F 10424 bytes
font_02_sfnt_off000096b2.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x96B2 4324 bytes