Malicious PDF — malware analysis report

Static analysis result for SHA-256 056f559f8594613c…

MALICIOUS

PDF

44.3 KB Created: 2020-09-29 13:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44700926e47d0643835ac686c8c76219 SHA-1: 803cd7e4a4155d8a8c658d3fc376477190370b23 SHA-256: 056f559f8594613cf4a9538db8620fbd028dd9995b4c07447fc21a85233f3c03
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious due to its embedding of numerous links that lead to known malicious redirector infrastructure. The file also contains a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The primary malicious activity observed is the redirection of users to potentially harmful websites via these embedded links.

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://cctraff.ru/mozel?keyword=advanced+category+management+pdf
    • http://rofom.expsalonandspa.com/uploads/1/3/2/6/132696030/fosupawunapefapi.pdf
    • http://kaxofos.crowfootguitars.com/uploads/1/3/2/6/132696147/ca829db12b8d4d2.pdf
    • http://vobikor.thelabclan.com/uploads/1/3/1/4/131414661/lapedorupe.pdf
    • http://files.timothygabrielmusic.com/uploads/1/3/1/4/131411688/315585b2494add.pdf
    • http://files.masonkane.com/uploads/1/3/1/8/131871488/2cfd7.pdf
    • https://site-1037022.mozfiles.com/files/1037022/diwebifinawozipinasulu.pdf
    • https://site-1037279.mozfiles.com/files/1037279/zukadupof.pdf
    • https://site-1037005.mozfiles.com/files/1037005/79302397207.pdf
    • https://site-1036745.mozfiles.com/files/1036745/18948818711.pdf
    • https://site-1037218.mozfiles.com/files/1037218/7282460131.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9956/9829/files/modalidades_del_genero_dramatico.pdf
    • https://cdn.shopify.com/s/files/1/0432/9570/3204/files/85808519610.pdf
    • https://cdn.shopify.com/s/files/1/0462/5160/6167/files/bridal_mask_season_3.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6010/files/gubonexixalifesuvilasadej.pdf
    • https://cdn.shopify.com/s/files/1/0433/9446/5948/files/instagram_follow_script.pdf
    • https://cdn.shopify.com/s/files/1/0438/2644/6498/files/dofelobepum.pdf
    • https://cdn.shopify.com/s/files/1/0432/3259/2040/files/86100244541.pdf
    • https://cdn.shopify.com/s/files/1/0482/4029/6090/files/black_and_cream_brindle_dachshund.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_off00006c4d.bin
50d4660a7d67b28c6739278d42a71ec815b9da431bbd3de123f34f70f18edeb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4D 5416 bytes
font_01_sfnt_off00007eb6.bin
8593041f735ba16e231faa2a138df8e691c1eeeb1df111688d0adda4eaed7942		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB6 10948 bytes

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