Malicious PDF — malware analysis report

Static analysis result for SHA-256 15df0c693ff7d9b8…

MALICIOUS

PDF

44.0 KB Created: 2020-08-17 18:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd313de8877fcdd8a28342ad24e0180c SHA-1: c58c70b04bf67dbb010ae055cdf321d545fa3da5 SHA-256: 15df0c693ff7d9b8c402866d75cbc95fcb33dd287e5f6bf59c8d5aa337f6fbb5
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific redirector URL, indicating a phishing or scam attempt. The embedded content, though obfuscated, includes the URL 'https://ttraff.cc/pify?keyword=action++full+version+cracked', suggesting a lure for cracked software. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links points to a link farm strategy.

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=action++full+version+cracked
    • http://suvijup.southbaymusicschool.info/uploads/1/3/1/4/131452846/71290afe.pdf
    • http://files.blackbullfrosterley.com/uploads/1/3/1/4/131482823/1ac2e16344.pdf
    • http://files.streamskinz.com/uploads/1/3/1/3/131398428/julupujenopo-jewidokosimadi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/8720/7327/files/rabipemowijito.pdf
    • https://cdn.shopify.com/s/files/1/0434/5099/0753/files/fukinujobawekutom.pdf
    • https://cdn.shopify.com/s/files/1/0441/2522/5112/files/gunufute.pdf
    • https://cdn.shopify.com/s/files/1/0431/0407/5933/files/27154353131.pdf
    • https://cdn.shopify.com/s/files/1/0434/1137/4234/files/kinovavotugopub.pdf
    • https://cdn.shopify.com/s/files/1/0432/2151/6448/files/wuzudikolovasav.pdf
    • https://cdn.shopify.com/s/files/1/0431/5358/8390/files/50321174169.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6396/files/19207308201.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44219577828.pdf
    • https://cdn.shopify.com/s/files/1/0436/7027/4201/files/78683993878.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fatexuxutul.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_off00006a70.bin
f6510f65bf71f7ba3cfc5fba64dc4ba76a5e54c1c1676e28d0f7c69a4ca54cb2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A70 5128 bytes
font_01_sfnt_off00007bef.bin
a7fa12d2f382418ed2b4516dd8f2f98035362d6eb4f064b8cbe1a69b5122678f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BEF 12184 bytes