Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f09aeee91eb8f5…

MALICIOUS

PDF

43.1 KB Created: 2020-08-04 02:50:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d4d3ab1c8ab7a763af579ac95e7d373 SHA-1: 08721e86caaeb5564e6addae3b685643a24a369f SHA-256: 45f09aeee91eb8f583ed79600ddaf066f29e7e509b8545cebb32e44df52b1ddd
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though partially corrupted, contains text related to 'finger arthritis exercises pdf' and the tool 'wkhtmltopdf', suggesting a lure. The PDF also contains a large number of external links, many pointing to Shopify domains, which is indicative of a link farm used for SEO poisoning or to obscure the true malicious destination. The primary malicious IOC is the redirector URL.

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.com/pify?keyword=finger+arthritis+exercises+pdf
    • http://files.rahealtyns.com/uploads/1/3/1/4/131437725/06f652fa.pdf
    • http://files.brain-wiselearning.com/uploads/1/3/1/4/131406600/xazotitepe.pdf
    • http://files.barbararas.com/uploads/1/3/1/6/131637606/2623508.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0316/files/18302148715.pdf
    • https://cdn.shopify.com/s/files/1/0430/6812/9431/files/30173755364.pdf
    • https://cdn.shopify.com/s/files/1/0447/9392/1685/files/arcpy_spatial_join.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1085/files/17592467673.pdf
    • https://cdn.shopify.com/s/files/1/0432/3603/2680/files/popovi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0881/0398/files/99179717074.pdf
    • https://cdn.shopify.com/s/files/1/0440/7456/5784/files/jukunariguvofufepete.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6165/files/simple_java_game.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/niwazijigaledaxafa.pdf
    • https://cdn.shopify.com/s/files/1/0437/1762/3957/files/liwijilefewovojumusutu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8785/4749/files/74534024557.pdf
    • https://cdn.shopify.com/s/files/1/0432/8456/2086/files/naregobav.pdf
    • https://cdn.shopify.com/s/files/1/0432/4058/7431/files/magirufikilapil.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_off000068f5.bin
a2df43680f2ae3938272446fdee0d2152297c7308dc79d6a2b482bdda199aea0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F5 5408 bytes
font_01_sfnt_off00007b63.bin
5c60e65eb580abb2dc0acdffcf6f6a27bc980d11db868f71a1935f80a08c5f1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B63 10660 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.