Malicious PDF — malware analysis report

Static analysis result for SHA-256 04f61cbe38776eb4…

MALICIOUS

PDF

42.9 KB Created: 2020-08-18 16:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 908b4c29ab62179455bacdd4a9d06033 SHA-1: 155d30069e035c3cb8454766b3ef76c227ff1d80 SHA-256: 04f61cbe38776eb464d3e03130571f087030e4b2c64bf34428440efbde6a25fa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which point to external PDF files hosted on various domains. One prominent URL, 'https://ttraff.com/pify?keyword=borns+10000+emerald+pools', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'emerald pools' and the authoring application, suggesting a lure to potentially malicious content hosted on the linked domains.

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.com/pify?keyword=borns+10000+emerald+pools
    • http://tedila.theitalianbridge.com/uploads/1/3/1/8/131856772/9629280.pdf
    • http://files.gritfitnessny.com/uploads/1/3/1/6/131606822/kazukonij.pdf
    • http://files.troutbum.ca/uploads/1/3/2/7/132710655/046c6686a.pdf
    • http://files.backdoormission.ca/uploads/1/3/1/6/131637273/f40cf99.pdf
    • http://files.honoraryislander.com/uploads/1/3/1/3/131384638/nujupelamikino_luwosasoraxid_zelatamezagu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5750/4668/files/zaxobonazazedekapopegujun.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/ramif.pdf
    • https://cdn.shopify.com/s/files/1/0427/3537/0407/files/soviwetisujagem.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/13300588308.pdf
    • https://cdn.shopify.com/s/files/1/0437/6789/0069/files/merizewuwabagemupeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/8406/2622/files/law_and_order_svu_opening.pdf
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/jedatidusum.pdf
    • https://cdn.shopify.com/s/files/1/0433/3263/2730/files/calendar_november_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4885/files/gibuwilozuwerunibo.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_off000069a7.bin
3c88a01e0cfa63755840cf6002f95f2fe027cbb134dbdaa7c26f4aace82d4c7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x69A7 5348 bytes
font_01_sfnt_off00007bb7.bin
99972f0a35b89a9c50519e54e72eac6b5c1caf263895618f357bd8bf56f0e22f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB7 10312 bytes