Malicious PDF — malware analysis report

Static analysis result for SHA-256 5abc3a73f2590d5a…

MALICIOUS

PDF

40.2 KB Created: 2020-08-19 19:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0546f37e4b683eb89757ad9034a76a06 SHA-1: 87bcd43919c4debb6a9800387a77e7b4fed4045a SHA-256: 5abc3a73f2590d5a7aef61926b682121fc3ea637ec76e53f335d6106dff93a29
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or redirection attempt. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is used to obscure the final destination. The document body itself contains text related to movie downloads, likely a lure to encourage clicks on the malicious links.

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=rascals%2528+2011+full+movie+dvdrip
    • http://files.setonmiraclemiles.com/uploads/1/3/1/8/131856706/c9c269.pdf
    • http://files.theblessedfruit.com/uploads/1/3/1/8/131871633/5452665.pdf
    • http://jurixerug.geektravelgroup.com/uploads/1/3/1/4/131407377/lagavegov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/gujonafebirabulusil.pdf
    • https://cdn.shopify.com/s/files/1/0436/8783/7849/files/autocad_structural_drawing_samples.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8521/files/vebum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53522836856.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/fufizirefegawige.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/vonek.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8357/files/xusiwepatuvugemu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5860/9819/files/8491889347.pdf
    • https://cdn.shopify.com/s/files/1/0429/6740/0601/files/69705096321.pdf
    • https://cdn.shopify.com/s/files/1/0434/4401/1168/files/50845350286.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_off00005c8a.bin
71dff815340efcb3bbf19b4d4b082d8388882a20fc12f8fec8ea5bdf254a6934
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C8A 5772 bytes
font_01_sfnt_off0000702c.bin
93a5e0cd42ce6e6c41e4ed5155bbcbec522dee5e56a8e78e420c522c3e0287d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x702C 10664 bytes