Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc4e3ce70142825…

MALICIOUS

PDF

44.6 KB Created: 2020-08-29 06:43:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bc072d0b63f27aeff4ff1848eb9d053 SHA-1: 15be0873ed9168a983253bd864d46d08a5935653 SHA-256: fdc4e3ce70142825573b347d8dfc3cfa9677cf8d53b5f68428c5f982f2e4ee15
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, characteristic of a link farm. The primary malicious indicator is a link to `https://ttraff.ru/wix?keyword=harry+potter+and+the+prisoner+of+azkaban+book+common+sense+media`, which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the intended lure. The large number of benign-looking Shopify links likely serve to camouflage the malicious redirector within a larger set of outbound links.

Heuristics 3

  • 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.
  • 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/wix?keyword=harry+potter+and+the+prisoner+of+azkaban+book+common+sense+media
    • https://cdn.shopify.com/s/files/1/0449/4819/3439/files/88384523019.pdf
    • https://cdn.shopify.com/s/files/1/0461/9422/9406/files/pirosew.pdf
    • https://cdn.shopify.com/s/files/1/0429/7555/9829/files/articulos_definidos_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/2002_toyota_camry_owners_manual.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bb3d96d2c654f6f813b4d0e36dd2f4c.pdf
    • https://static.usrfiles.com/ugd/b8c837_d988595ce33d4c4998164ba8969ca58f.pdf
    • https://static.usrfiles.com/ugd/b8c837_35c996ce7bbc47c780832eab7dd9be6c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b96a4c89376f4a4994b174d010bb9ccc.pdf
    • https://static.usrfiles.com/ugd/b8c837_d48dd6a8ac124824b8f25f304ab1697e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f17c6554e1ce4a27b2ea7a8688aa29ca.pdf
    • https://static.usrfiles.com/ugd/b8c837_9fbb5fc6edde4f4c92e68ec0a241a47e.pdf
    • https://static.usrfiles.com/ugd/b8c837_778ce9c277bf44dc8340b1fe1c9aa1ef.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a52eb78221f4fe49f00f493dab48e00.pdf
    • https://cdn.shopify.com/s/files/1/0436/2951/0814/files/ralusipikenejesif.pdf
    • https://cdn.shopify.com/s/files/1/0433/7424/8097/files/principe_de_fonctionnement_du_carburateur.pdf
    • https://cdn.shopify.com/s/files/1/0431/2793/1034/files/rubuwamomivititeza.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_off00006ed4.bin
3d90b9dbb38add639ab9a5c356f0c22c46526ff14bb144f7db61af6ba81009bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED4 5680 bytes
font_01_sfnt_off00008200.bin
701a0e0c904bb07299ffa46ac42502f6d2d8cb645cc442fe3eb35622a56ceed3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8200 10220 bytes