Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b887ba4ce4fef01…

MALICIOUS

PDF

41.1 KB Created: 2020-08-29 03:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ca230bd629c0e4cd7c0286634c98c48 SHA-1: bad79e88fa10f0495b1ed63c764d164100391077 SHA-256: 6b887ba4ce4fef01c0fa83460ed1d0c9efe2e547caa7af23b44f1af62173838b
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is flagged as malicious. The document body, though heavily obfuscated, contains text related to movie downloads and the malicious URL itself. The presence of numerous external links, many pointing to Shopify-hosted PDFs, suggests a link farm or SEO poisoning tactic to drive traffic to the malicious redirector. No scripts were extracted, but the PDF structure and malicious link indicate 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/wix?keyword=captain+phillips+movie+free++in+tamil
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/7066/6390/files/62104369854.pdf
    • https://cdn.shopify.com/s/files/1/0432/0457/5387/files/bovepufasurafomukas.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7880/files/48473709325.pdf
    • https://cdn.shopify.com/s/files/1/0438/4695/9261/files/cat_c15_belt_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0463/3542/6721/files/boss_hindi_movie_songs_download_320kbps.pdf
    • https://cdn.shopify.com/s/files/1/0432/0490/3073/files/levejefiforamamadezux.pdf
    • https://cdn.shopify.com/s/files/1/0434/5685/6230/files/14375839917.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/fiwolexususijupow.pdf
    • https://cdn.shopify.com/s/files/1/0437/2057/3080/files/93948718476.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9277/files/popular_flute_songs_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/gofuridozelib.pdf
    • https://cdn.shopify.com/s/files/1/0448/4546/5762/files/install_git_on_ec2.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_off0000646b.bin
4535feedce7ecafb46ee6f9651890d08f8401aae9331c512ee32a47d25a9f1c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x646B 5108 bytes
font_01_sfnt_off000075a4.bin
640c4344786d3ebc25de971025c957ec516527ba7b087f732be622fc93389f2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x75A4 9908 bytes