Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae1c029621a7080…

MALICIOUS

PDF

31.4 KB Created: 2020-08-22 02:40:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f7cf04a5c86c92a594f6a6343058962 SHA-1: 9f0942bc944044f3bcea8b721df687b2ee4ca620 SHA-256: 0ae1c029621a7080af66b270181abf72a8358ebb4911ce843be18a79b6fe9f67
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of embedded URLs, with one specifically identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of numerous links suggests an attempt to lure users to malicious sites, likely for phishing or malware distribution.

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.com/pify?keyword=bolo+em+forma+ballerine
    • http://saxawod.g3valeting.co.uk/uploads/1/3/1/0/131071252/bepitojibexazaxozat.pdf
    • http://nitigubik.bandstofans.com/uploads/1/3/1/4/131406665/jisojogagavudib_rikodivoton.pdf
    • http://files.biancasams.com/uploads/1/3/1/6/131636642/4638240.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1913/1285/files/81419490896.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/the_canterbury_tales_translated_by_nevill_coghill.pdf
    • https://cdn.shopify.com/s/files/1/0437/0402/5242/files/biopsicologa_pinel.pdf
    • https://cdn.shopify.com/s/files/1/0429/3607/4396/files/65241631251.pdf
    • https://cdn.shopify.com/s/files/1/0434/5544/7202/files/fujakofew.pdf
    • https://cdn.shopify.com/s/files/1/0447/1518/0188/files/zarudisegofizu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6141/8913/files/administrative_law_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/36705527292.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdf
    • https://cdn.shopify.com/s/files/1/0429/2742/3654/files/41017184766.pdf
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/petawuriwijapibukadesi.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004361.bin
bbf5924ae3815ff3842436c6d1e86193ee108248cdc3e5b2d223dfeb89f9fa91
pdf-font-stream PDF embedded font (sfnt) at offset 0x4361 4924 bytes
font_01_sfnt_off0000540e.bin
f84977de3ec674e8f0eea885396f9a0e5fe8dc62d54310403597611853bc0b3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x540E 8648 bytes