Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5e228e97b5d85e8…

MALICIOUS

PDF

58.7 KB Created: 2020-08-02 20:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4864d0c16b6f7eb639349dbd7ae3b656 SHA-1: f4856f61f1098bcff5f81078bb1169f1157dcef3 SHA-256: a5e228e97b5d85e88477cf876bef8d2f8dadba23e1e77d30507b710874066c75
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains that host PDF files, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=eager+loading+sequelize'. The document body, though heavily obfuscated, contains this URL and references to 'eager loading sequelize', likely a lure to entice users to click the malicious link. The presence of numerous Shopify-hosted PDF links may be an attempt to blend in with benign content.

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=eager+loading+sequelize
    • http://files.thegleasoncenter.com/uploads/1/3/0/7/130775049/xibapivev.pdf
    • http://files.azkillerbeessoftball.com/uploads/1/3/0/8/130874518/jemizip.pdf
    • http://files.moonlightairfoundation.org/uploads/1/3/1/3/131379567/c7506e54324e.pdf
    • http://files.spacetigertattoos.com/uploads/1/3/0/7/130739951/movojetinodot.pdf
    • https://cdn.shopify.com/s/files/1/0432/7853/2774/files/mukajikolenuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/86094791518.pdf
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/63982821177.pdf
    • https://cdn.shopify.com/s/files/1/0440/6044/2774/files/redijiwakasujenovu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kewosa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/87862109962.pdf
    • https://cdn.shopify.com/s/files/1/0432/9226/2560/files/26841716125.pdf
    • https://cdn.shopify.com/s/files/1/0430/9961/9492/files/46642765892.pdf
    • https://cdn.shopify.com/s/files/1/0432/8731/4590/files/tibozoparuvafu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6251/8182/files/20809009005.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/gugutat.pdf
    • https://cdn.shopify.com/s/files/1/0437/7323/1258/files/wosesomokekajo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4430/7098/files/79331806421.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008fd8.bin
b4e5ff0cdb220421a8b2dff00fcf295eb8f7503e4cc7fdec8fb46f44c8e8ce60
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD8 4928 bytes
font_01_sfnt_off0000a09a.bin
bba775edc5136d2467b4404a44da9a6efc4d5245728f484a4213e9ca9dc70d41
pdf-font-stream PDF embedded font (sfnt) at offset 0xA09A 15040 bytes
font_02_sfnt_off0000d008.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xD008 4324 bytes