Malicious PDF — malware analysis report

Static analysis result for SHA-256 074409bd66a698f4…

MALICIOUS

PDF

42.3 KB Created: 2020-08-09 14:12:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2da27c888ea5debb0fd30aa2da25bd4c SHA-1: daa9b7ec84fd54e01bfbdb585475a1e7a2eec876 SHA-256: 074409bd66a698f49811b807c92b6eda8366545a1c4e7d126b8d6825a5dc2353
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to manipulate search engine results and lure unsuspecting users. The presence of numerous external links, including one to a known malicious redirector, strongly suggests an attempt to direct users to malicious websites.

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.ru/pify?keyword=social+entrepreneurship+ideas+pdf
    • http://files.skmusicboosters.org/uploads/1/3/2/6/132682745/riwinuzuwamavo-dogiv-tugaletivima-xosiz.pdf
    • http://files.deadmandiscs.com/uploads/1/3/1/8/131856770/robakidudedani_dijitej.pdf
    • http://files.rayzinktattoo.com.au/uploads/1/3/1/4/131452935/zapubulugam.pdf
    • http://files.northernbugwear.ca/uploads/1/3/1/4/131407165/modofuda-tevuravikat-xejaduve-xewuzedalupus.pdf
    • http://files.pacifictraininggroup.com/uploads/1/3/2/6/132682441/7d91c07658.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/0033/8331/files/79262943012.pdf
    • https://cdn.shopify.com/s/files/1/0439/7151/0430/files/7342063066.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8118/files/voduwonudovakaka.pdf
    • https://cdn.shopify.com/s/files/1/0432/9806/2501/files/13963735554.pdf
    • https://cdn.shopify.com/s/files/1/0434/6963/5746/files/fenovapagabepa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/jisire.pdf
    • https://cdn.shopify.com/s/files/1/0433/4724/7263/files/midnight_cowboy_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/5978/1538/files/kagopab.pdf
    • https://cdn.shopify.com/s/files/1/0440/5189/0341/files/jafevivapifaxopunom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuvekalododit.pdf
    • https://cdn.shopify.com/s/files/1/0428/6165/8279/files/1448739820.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_off000068dc.bin
98d78d6c2f526375f5df2b575ae570c2e163808ccdfc8d0e34dd8cafa8dde934		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68DC 5344 bytes
font_01_sfnt_off00007b01.bin
a15511bc7e0d0162e3b785d41716f5cc406776eff25d1dbb6287c7d784b41535		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B01 9748 bytes

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