Malicious PDF — malware analysis report

Static analysis result for SHA-256 0271b29141178df9…

MALICIOUS

PDF

50.3 KB Created: 2020-08-05 17:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2ab90fe734620dc4bae99405e2d7b24 SHA-1: f212c45e0169caf28a871358073acf91d2c60457 SHA-256: 0271b29141178df99b53bbb562fffd5b9157fffddde040bcb2cd125221b3810b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though obfuscated, contains text suggesting a report, which is likely a lure. The presence of a link farm and a critical heuristic firing for malicious redirector links strongly indicates a phishing or malware distribution attempt.

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=beps+action+4+final+report+pdf
    • http://files.saujs.co.za/uploads/1/3/2/6/132681824/8694376.pdf
    • http://files.heryellowribbon.org/uploads/1/3/2/6/132681378/1430029.pdf
    • http://files.mainehunterjumper.com/uploads/1/3/1/3/131380052/dojagozaxe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1551/1968/files/volalakavuxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/boys_like_girls_thunder.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/nalux.pdf
    • https://cdn.shopify.com/s/files/1/0429/4718/2759/files/5943886818.pdf
    • https://cdn.shopify.com/s/files/1/0430/4191/5042/files/60734741959.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwizesovipijekugufex.pdf
    • https://cdn.shopify.com/s/files/1/0428/0870/5187/files/issuu_download_link.pdf
    • https://cdn.shopify.com/s/files/1/0430/7494/5184/files/9344773789.pdf
    • https://cdn.shopify.com/s/files/1/0432/8793/7179/files/titoxelawefej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44219577828.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/1563992629.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_off00008625.bin
5cc193794fb9cef398cf1ff7c9a6c5f2b19c65b89cf5ff21921b1094245dd649
pdf-font-stream PDF embedded font (sfnt) at offset 0x8625 5284 bytes
font_01_sfnt_off00009834.bin
3f48122d69eba084f0306eed18bd6af0edc99458a099691f3f78b04ecd8afc8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9834 10424 bytes