Malicious PDF — malware analysis report

Static analysis result for SHA-256 16944368a5adcd15…

MALICIOUS

PDF

37.5 KB Created: 2020-08-19 15:08:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f7838aba8bcf64b0f02c33e204d2b9f SHA-1: 0f9ed7bd15d59eb261d2dc724def47e54dc1cebd SHA-256: 16944368a5adcd151d7699d643c437fb723337ee7d9c9c6b7a4220eec5d3c013
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO spam operation. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.cc', which is used to obscure the final destination. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful sites.

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/pify?keyword=aziza+mustafa+zadeh+piano+sheet+music
    • http://loloz.whatsoninhoniton.com/uploads/1/3/2/6/132695832/cd24a98b53e2.pdf
    • http://fegori.hboydphoto.com/uploads/1/3/1/6/131607163/368481.pdf
    • http://kerari.humphreysfreelancemedia.com/uploads/1/3/1/1/131164250/d8c1eb22.pdf
    • http://vodenol.musicbyspecialarrangement.com/uploads/1/3/1/3/131379246/7102437.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/4460/9943/files/46194816499.pdf
    • https://cdn.shopify.com/s/files/1/0434/3241/1298/files/apocalipticos_e_integrados_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0437/3794/0133/files/xajavexejunelenogakulof.pdf
    • https://cdn.shopify.com/s/files/1/0431/1921/4758/files/roblox_script_viewer_script.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66179678401.pdf
    • https://cdn.shopify.com/s/files/1/0450/4908/6102/files/actuarial_control_cycle.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/83035552690.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3387/files/lab_report_microscope.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/apsc_exam_question_paper_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6545/8336/files/adding_to_20_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/7409/3217/files/tefilakob.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_off000048a9.bin
f7b88da8c7205c040c4136be98d81f77c0bb64ebce2b42677b93a1b5774dff0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48A9 5188 bytes
font_01_sfnt_off00005a33.bin
248aff82a84193a9f416dbb94cec4fd23bd759f0d5d3ad2459b79daa4077aa48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A33 9608 bytes
font_02_sfnt_off00007b1c.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B1C 4324 bytes

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