Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1bec3c1c3582de2…

MALICIOUS

PDF

34.5 KB Created: 2020-08-11 02:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60f21312e3b73e893dfc3cb914f68bc3 SHA-1: b9b9cdcee6e2bf16db51aa191b48f1fc65ee3f40 SHA-256: e1bec3c1c3582de22314a84b81bb9cc1577cdca11608be6b5aaa7aec3785ef1d
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, designed to appear as search results for a book download. One critical heuristic indicates a link to a known malicious redirector, ttraff.cc, which is likely the primary payload delivery mechanism. The document body itself is heavily obfuscated but contains the same redirector URL, reinforcing its malicious intent. The presence of numerous PDF links suggests a link farm or SEO poisoning tactic to drive traffic to malicious sites.

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.cc/wb?keyword=goyenda%20ashok%20thakur%20samagra%20pdf%20free%20download
    • http://batokax.athenalenawee.org/uploads/1/3/1/3/131380600/acf2a7c7.pdf
    • http://danopase.invenssouthafrica.com/uploads/1/3/1/3/131398020/gewomejedagozura.pdf
    • http://files.dianeperell.com/uploads/1/3/1/4/131453645/vebesukezofonev.pdf
    • https://cdn.shopify.com/s/files/1/0435/8638/8136/files/55338094984.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4155504299.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/voximukifidokajokomafuvo.pdf
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/volekudib.pdf
    • https://cdn.shopify.com/s/files/1/0431/9277/8901/files/zaxuxezuxonumof.pdf
    • https://cdn.shopify.com/s/files/1/0438/6720/9893/files/xisetowupomisisawasolab.pdf
    • https://cdn.shopify.com/s/files/1/0431/8940/3810/files/juzunona.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/23921062515.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/44340705722.pdf
    • https://cdn.shopify.com/s/files/1/0437/8486/3893/files/rang_and_dale_s_pharmacology.pdf
    • https://cdn.shopify.com/s/files/1/0430/8906/8185/files/cae_advanced_trainer.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/korenisaduwajulilosenu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3590/files/gold_gradient_illustrator.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_off000046f1.bin
e97ffe2019a829d8c11e7378e6ec947666993af318fc9d38eb0935687877216b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46F1 5744 bytes
font_01_sfnt_off00005a7c.bin
8805a24631874cfadafab85372a945960f056d503de58cfa8e8fb38b7033596e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A7C 10148 bytes

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