Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7f7cd339193e21e…

MALICIOUS

PDF

44.9 KB Created: 2020-07-21 09:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f605a3bd762d8c5a7684205e11990a18 SHA-1: 75b600ebc6c19e2132e6694dec36e2bbc61988b6 SHA-256: e7f7cd339193e21e89e64945331c23c17752d26b56f89ed41b957b64ad3c7c68
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains embedded links that point to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. Additionally, it hosts a large number of external PDF links, many hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning tactic to increase visibility and traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

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/wb?keyword=came%20sliding%20gate%20motor%20manual
    • http://files.4arrowsoutdoors.com/uploads/1/3/0/8/130814672/1910526.pdf
    • http://files.communitychurchsheppey.com/uploads/1/3/0/8/130874318/49948dc.pdf
    • http://files.barakacommunity.co.uk/uploads/1/3/1/0/131070842/suzuko_jetemiviwarepof.pdf
    • http://files.magicaladventurestravelwithjennifer.com/uploads/1/3/1/6/131606434/tamerizunek.pdf
    • http://files.magicaladventurestravelwith
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/gabesejonilimusiberawala.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/38937772424.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/vibirimurejixoveduw.pdf
    • https://raxurutib.files.wordpress.com/2020/07/38939809648.pdf
    • https://mavidajefer.files.wordpress.com/2020/06/zawowasulaxe.pdf
    • https://vimaxagowuno.files.wordpress.com/2020/07/72142491421.pdf
    • https://gilolarezuj.files.wordpress.com/2020/07/19564034723.pdf
    • https://kudivex.files.wordpress.com/2020/06/45146252884.pdf
    • https://cdn.shopify.com/s/files/1/0434/4945/0661/files/54062167062.pdf
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/97777909095.pdf
    • https://cdn.shopify.com/s/files/1/0429/0864/7580/files/linuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/0697/6422/files/bukedudeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/5534/8888/files/mitikonekupaxojizuroduxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2413/7890/files/siranapipi.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000730b.bin
5ae4dcb05271f54c6d907e96768f62b9559a9bbd1a5ab8b7854066d384d4d7ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x730B 5052 bytes
font_01_sfnt_off00008420.bin
b862d90b829518ceed3e02804f29c304f3d4c478edbd52d7dd8b5ba4ff052681		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8420 10068 bytes

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