Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fcb5408c0f05005…

MALICIOUS

PDF

40.7 KB Created: 2020-08-02 00:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6a7d98a772bbd645b6a3dd6cafe9921 SHA-1: 575374ea6ba2c1a5272649bf0b78bf010c40d005 SHA-256: 4fcb5408c0f05005d841dd2215fe245599e40c2d7362317a017d8fd84ac7ab3f
128 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a link to a technical manual. The document also hosts a large number of links to other PDFs, likely for SEO manipulation to improve search engine ranking for malicious content. The presence of a fake invoice lure further supports the social engineering aspect of this attack.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=eaton+industrial+hydraulics+manual+5th+edition+pdf
    • http://files.kathleenbrownpsychicmedium.com/uploads/1/3/0/7/130775950/dinetepoxo.pdf
    • http://files.mytotalnutrition.com/uploads/1/3/1/0/131070212/892c1.pdf
    • http://files.cozykidsembroidery.com/uploads/1/3/0/7/130775228/7d6c5a24e.pdf
    • http://files.swctoa.org/uploads/1/3/0/8/130873951/5040845.pdf
    • https://cdn.shopify.com/s/files/1/0438/2395/6125/files/zunewutagob.pdf
    • https://cdn.shopify.com/s/files/1/0438/5754/3328/files/79829319358.pdf
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/zuzakofedopubivabokiriwi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/danedogorolulefumatexa.pdf
    • https://cdn.shopify.com/s/files/1/0438/3807/9138/files/bobid.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/28525740760.pdf
    • https://cdn.shopify.com/s/files/1/0440/2230/0822/files/kitchenaid_dishwasher_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/4071/7472/files/femafiguperabetufemot.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7876/files/merusirixiguloju.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/78170907938.pdf
    • https://cdn.shopify.com/s/files/1/0435/3445/0840/files/87903135531.pdf
    • https://cdn.shopify.com/s/files/1/0431/2635/8173/files/povijaxu.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_off00005136.bin
a5bef24d43b64aa537396907e793df394ae3675f148474353327b80de85d209e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5136 5460 bytes
font_01_sfnt_off000063a2.bin
cfe9b7c35a541d4aa69b44ffb82d048a79711d67a9db46735535de0057d07f6f
pdf-font-stream PDF embedded font (sfnt) at offset 0x63A2 10428 bytes
font_02_sfnt_off0000873f.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x873F 4324 bytes