Malicious PDF — malware analysis report

Static analysis result for SHA-256 4acc174b1f749e28…

MALICIOUS

PDF

44.8 KB Created: 2020-08-08 17:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5e7ae4ae6bcd848fe819add722d73ad SHA-1: 96249bffa51c98017f5405cfaa68968fd05ddbda SHA-256: 4acc174b1f749e2813f06dd0da1147e0ef32f7cc8b8f64dce0130ddaab495a41
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru' with a 'blockchain revolution' keyword. This indicates a phishing or scam attempt. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly supports the malicious verdict. The primary malicious IOC is the redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=blockchain+revolution+pdf
    • http://files.idoutpost.com/uploads/1/3/1/4/131437919/ziruxasiz-kalodox-sikalukore-tebisu.pdf
    • http://files.offmyeasel.com/uploads/1/3/1/3/131379268/mumosoriza.pdf
    • http://files.skyhighservices.com/uploads/1/3/0/7/130776483/nuzaxewinuxapugix.pdf
    • http://files.serialmachines.com/uploads/1/3/1/4/131408664/surabasewof_vifatemur_vakilokix_fixeresi.pdf
    • http://files.regalbakeryusa.com/uploads/1/3/1/4/131406412/7743718.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/26818208553.pdf
    • https://cdn.shopify.com/s/files/1/0433/1254/5950/files/48144824366.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/xeligu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8376/7713/files/20613736917.pdf
    • https://cdn.shopify.com/s/files/1/0431/3058/5250/files/forobesuzinamukuvaweri.pdf
    • https://cdn.shopify.com/s/files/1/0438/0321/3984/files/20772056218.pdf
    • https://cdn.shopify.com/s/files/1/0432/4121/0024/files/begigoli.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6822/files/tonodoge.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/dusadiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/topawafobup.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2454/files/57027584243.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0071/files/80922428014.pdf
    • https://cdn.shopify.com/s/files/1/0431/7816/4387/files/kinewupolupusotadixujobe.pdf
    • https://cdn.shopify.com/s/files/1/0440/3780/0086/files/jokudiruboveromaxafed.pdf
    • https://cdn.shopify.com/s/files/1/0436/9599/7096/files/imperative_programming_practical.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_off00006cbc.bin
8fab491b62bacc80662026cc55c15f63d3d15ed777344bdd694034902b7d69df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBC 5240 bytes
font_01_sfnt_off00007e95.bin
7f3590b368d0cea117029c8fa57dc8f83294986f2ce7d966f5aa609f47aa8eac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E95 13560 bytes

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