Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aedce119751e182…

MALICIOUS

PDF

40.6 KB Created: 2020-08-30 07:55:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e18e0bbde4bd8ad8b16a92ff40ab878 SHA-1: 47139597b422441312ed2e400184ecece59541b9 SHA-256: 6aedce119751e182194d03e7d7f1b97cdf32ce152b83c462933513b36d3dd1c4
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 pointing to 'ttraff.club'. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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.club/wix?keyword=fsa+practice+book+grade+3
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8198/0321/files/jenezuvorev.pdf
    • https://cdn.shopify.com/s/files/1/0433/5520/9879/files/canon_lide_100_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/1916/4058/files/kobadovebejevawexumivari.pdf
    • https://cdn.shopify.com/s/files/1/0433/5121/2200/files/77048212241.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/jemerek.pdf
    • https://cdn.shopify.com/s/files/1/0440/5143/1574/files/boridiwixoketetafexin.pdf
    • https://cdn.shopify.com/s/files/1/0438/5724/8421/files/23803702718.pdf
    • https://cdn.shopify.com/s/files/1/0457/6860/5862/files/barfi_movie_subtitles.pdf
    • https://cdn.shopify.com/s/files/1/0438/8657/5771/files/excel_2013_date_format_day_of_week.pdf
    • https://static.usrfiles.com/ugd/122077_4441d1089bb241c095413c1919d47cb3.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4f1014a505f41c78a230d1c308fe998.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005627.bin
ec6d52a76fb9419f6ba0276d7da2070644ff76ae1ff3fee93e0d9eabfbe96211
pdf-font-stream PDF embedded font (sfnt) at offset 0x5627 1716 bytes
font_01_sfnt_off00005e81.bin
b84cb5c0d87a78d8997c1a50873d20e3fa3191fbad20e475695991a4700554cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E81 5532 bytes
font_02_sfnt_off0000715f.bin
54164bc5ea82499c176e3c30566f62c7ed4e5ab0823c89edfba20c2d907a9755
pdf-font-stream PDF embedded font (sfnt) at offset 0x715F 10656 bytes