Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb4b29e2ecca01a…

MALICIOUS

PDF

57.0 KB Created: 2020-08-20 11:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01c29b32dbc284a6125f8e5294d886d5 SHA-1: 8d20b09b9fe8148a203731b07b30bca8069dbadf SHA-256: 7cb4b29e2ecca01ae52b09183aa236a93288a039133908592645ac558b1bf0b0
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.cc/pify?keyword=mechanism+of+ecological+succession+pdf'. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=mechanism+of+ecological+succession+pdf
    • http://fifino.drvegetableinc.com/uploads/1/3/2/3/132302868/85ad8af17809.pdf
    • http://files.hcmsystemslimited.co.uk/uploads/1/3/0/9/130969160/gexeloma.pdf
    • http://files.raglandclay.com/uploads/1/3/1/8/131857465/manidesorumobod.pdf
    • http://files.ryansbarattadesign.com/uploads/1/3/0/9/130969003/pinej.pdf
    • http://files.alioleary.com/uploads/1/3/1/4/131409761/3391351.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/88061198540.pdf
    • https://cdn.shopify.com/s/files/1/0429/5580/0739/files/bones_season_premiere.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/11851148732.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/11678201032.pdf
    • https://cdn.shopify.com/s/files/1/0434/7179/8424/files/renezekodavofi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6241/files/zemisetojudose.pdf
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/abc_cursive_writing.pdf
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/bavenesesagafa.pdf
    • https://cdn.shopify.com/s/files/1/0434/7779/4982/files/aparato_circulatorio.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/vafurubikizetosuworobu.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_off0000a2bc.bin
a38062018b5338caecb121287521cd845cb17de7d0b17ff331948e5bce76ac7c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA2BC 5480 bytes
font_01_sfnt_off0000b537.bin
00ce7e3008680ef69c29325753ec71bde277e6e02939771c3c509aee1cf61882
pdf-font-stream PDF embedded font (sfnt) at offset 0xB537 9940 bytes