Malicious PDF — malware analysis report

Static analysis result for SHA-256 e145b735d3b0a6cf…

MALICIOUS

PDF

61.4 KB Created: 2020-08-20 03:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93c19f9cf4ac60e880e6bdee65815fa9 SHA-1: af86f97229611c304bd9a2503bbaddc76dc3c367 SHA-256: e145b735d3b0a6cf4178eca38ba496dff075a6c661cff23a9f3fe3eafd465c64
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is presented with a keyword relevant to Android development. This suggests the document's primary purpose is to trick users into clicking the malicious link, leading them to a harmful site. No scripts were extracted, and the document body was heavily obfuscated.

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=android+studio+2d+game+engine
    • http://files.decgallery.com/uploads/1/3/1/3/131384789/cc8b20d.pdf
    • http://files.treasuresofjoy.org/uploads/1/3/1/8/131871650/vovadif_gurodiw.pdf
    • https://cdn.shopify.com/s/files/1/0439/8533/8526/files/multiple_pngs_to.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/syndrome_des_anticorps_antiphospholipides_et_grossesse.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6369/files/65117257643.pdf
    • https://cdn.shopify.com/s/files/1/0431/2023/0564/files/7948562752.pdf
    • https://cdn.shopify.com/s/files/1/0434/2117/1879/files/gw2_ambrite_weapons_collection_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/78633740144.pdf
    • https://cdn.shopify.com/s/files/1/0429/2621/1238/files/62501710928.pdf
    • https://cdn.shopify.com/s/files/1/0440/2901/8262/files/97019305343.pdf
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/74090139958.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_off0000aaaf.bin
5b7cd58009f455796243f44a328a496fc7e15163b2c44189aabb5107ca871669		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAAF 5232 bytes
font_01_sfnt_off0000bc58.bin
c2a08717a2133079e832bccf93bdf74e35daff41665f093502811d39f2ba27c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC58 13988 bytes

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