Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b080a8420733fe9…

MALICIOUS

PDF

44.4 KB Created: 2020-08-20 06:28:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5844ada231eb95d2d708aa77b8e4f762 SHA-1: ab687742eb8ab86ef88fd7d2fe36133403480b7a SHA-256: 0b080a8420733fe9705d025109117542900557f121d6dc05ca245dfe212fcb0c
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=budgeting+templates+free'. Additionally, it exhibits a PDF link farm behavior, embedding numerous external links, many of which are to benign Shopify URLs but some are to unknown hosts. The ML classifier also strongly flagged this PDF as malicious. The embedded links suggest an attempt to drive traffic to malicious infrastructure, likely for phishing or malware distribution.

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=budgeting+templates+free
    • http://files.joshuaegallagher.com/uploads/1/3/1/6/131637308/b8d599ebe8a65f.pdf
    • http://sebexix.eliowellness.com/uploads/1/3/1/6/131636725/d625219e5.pdf
    • http://legekabod.aspectcareers.com/uploads/1/3/0/8/130873995/merofoxix.pdf
    • http://files.annascafebar.co.uk/uploads/1/3/1/4/131406947/dametopujanoparoko.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0688/5020/files/wigifesi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7780/3925/files/62415916346.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/kewuzo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0884/2152/files/40670792931.pdf
    • https://cdn.shopify.com/s/files/1/0431/8740/4968/files/84782388337.pdf
    • https://cdn.shopify.com/s/files/1/0428/9613/0211/files/98979753615.pdf
    • https://cdn.shopify.com/s/files/1/0429/2005/0855/files/40289034595.pdf
    • https://cdn.shopify.com/s/files/1/0436/2836/3939/files/vitixuxonojer.pdf
    • https://cdn.shopify.com/s/files/1/0435/6086/1845/files/sf_bm_diagrams.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/guitar_bar_chords_chart.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_off00006e69.bin
fc7797f8609b8409159456261710a57cce0026e39b013b48d98a7b2713559a5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E69 5408 bytes
font_01_sfnt_off000080b1.bin
2b342033792b791341916efedf3dc961bd51e865c635123f308bb32948a40a05
pdf-font-stream PDF embedded font (sfnt) at offset 0x80B1 10492 bytes