Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a5b295ce152b2e1…

MALICIOUS

PDF

55.1 KB Created: 2020-08-31 04:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d660e1756fdf34d883b2d8c35ec0f6a2 SHA-1: f6257492c7c9195667f32b565c9c4c29bb659f09 SHA-256: 6a5b295ce152b2e18412374df5f73223525f06fd230cd633a338428fe0ba98d6
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a download for 'white collar season 2 torrent'. This heuristic, combined with the ML classifier flagging the PDF as malicious, strongly suggests a phishing or malware distribution attempt. The PDF also contains a large number of links to other PDFs hosted on Shopify, likely for SEO manipulation to improve the ranking of the malicious link.

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=white+collar+season+2+torrent
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0608/2717/files/jadewisoposusolimo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0073/3596/files/antagonismo_farmacologia.pdf
    • https://cdn.shopify.com/s/files/1/0433/4669/0203/files/python_max_of_list.pdf
    • https://cdn.shopify.com/s/files/1/0435/7708/2019/files/metarhizium_anisopliae_biocontrol.pdf
    • https://static.usrfiles.com/ugd/cc14e4_568dc194c19c44feb97b1310cca2b8e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_82f703b384d34b78ba881e3ff4c92b8a.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/pudatorisaxolekon.pdf
    • https://cdn.shopify.com/s/files/1/0431/5188/4445/files/sotenilokewex.pdf
    • https://cdn.shopify.com/s/files/1/0432/7371/5870/files/encyclopedia_of_philosophy_and_the_social_sciences.pdf
    • https://cdn.shopify.com/s/files/1/0441/2581/4936/files/79048253479.pdf
    • https://static.usrfiles.com/ugd/af0aa9_6bf04069189a407a9102664e6d553543.pdf
    • https://static.usrfiles.com/ugd/e5cbe5_93df0cd1e09d4d5f8bb6c7d71ca7ec89.pdf
    • https://static.usrfiles.com/ugd/1fbf8b_bc4b5f1ea0344a00966be6100a8c8c6c.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007131.bin
a3ce36d7ba3c4646caffc51f91204f2b91fbb80eb23b42659de2ecf9972f5485		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7131 5032 bytes
font_01_sfnt_off00008250.bin
a6c204ddbb1eeef1f2d778724c49d9830c1d6ca44edc857396ca004580ad37b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8250 17724 bytes
font_02_sfnt_off0000b8b0.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8B0 16204 bytes

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