Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0fcfa4df9a7469e…

MALICIOUS

PDF

39.8 KB Created: 2020-08-22 20:41:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97783876617db79feae1a7b96c2d8a4f SHA-1: c9e607ce60d8a566e3c8826bd764f0ba9b6fc167 SHA-256: f0fcfa4df9a7469e79a704f1938efb9e6c3891ec07052e68ac69d957fdedb053
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=biopsychology+by+pinel+pdf'. This indicates the document is designed to redirect users to malicious content. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious PDF. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=biopsychology+by+pinel+pdf
    • http://files.melbournehistoricalcrimetours.com/uploads/1/3/1/3/131380263/5807732.pdf
    • http://files.dorothyfieldsart.com/uploads/1/3/1/3/131379719/4966654.pdf
    • http://files.phillipbennettband.com/uploads/1/3/2/3/132303359/ruluxasemojozib_nopupo_josituxil_pijozapev.pdf
    • http://files.nelecreativegroup.com/uploads/1/3/1/4/131437276/4641526.pdf
    • https://cdn.shopify.com/s/files/1/0439/1020/1499/files/low_carb_diet_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/1941/9291/files/guide_for_little_alchemy_2.pdf
    • https://cdn.shopify.com/s/files/1/0434/6858/7174/files/bowling_alone_putnam.pdf
    • https://cdn.shopify.com/s/files/1/0437/3368/0282/files/hospitality_training_manual_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6977/files/pagekatuwurozotuvusad.pdf
    • https://cdn.shopify.com/s/files/1/0438/2208/8354/files/92877667668.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0427/files/godsmack_greatest_hits.pdf
    • https://cdn.shopify.com/s/files/1/0430/0419/9075/files/26210108236.pdf
    • https://cdn.shopify.com/s/files/1/0436/9540/7269/files/sumuxifijul.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ed3.bin
6464928cf94c4a2ca8c8db5cd48380ff862bafa734ec2b48731a76626734e9d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED3 5404 bytes
font_01_sfnt_off0000712b.bin
12f7e67dbd4aad77d764d280e5e3dba9acc5d494bf57a3ecee81d039b95b8f5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x712B 9884 bytes

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