Malicious PDF — malware analysis report

Static analysis result for SHA-256 3975b0ad17bb17d4…

MALICIOUS

PDF

43.9 KB Created: 2020-08-10 20:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3edd84ae2ce7070825f53fd694821a78 SHA-1: a8cb5a2a16b1ed77ac7e30e95a3854bc9c3adc5b SHA-256: 3975b0ad17bb17d456bee524f11cb5656cbe9b91425c835cfc9c4f76b968b6ae
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, https://ttraff.cc/pify?keyword=candidiase+em+homem+pdf, which likely serves as the initial lure. The document body, though heavily obfuscated, contains references to this URL and other PDF-related lures, suggesting a phishing or scam attempt.

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/pify?keyword=candidiase+em+homem+pdf
    • http://files.poysontee.com/uploads/1/3/1/3/131398351/kunoxanobujemevil.pdf
    • http://jemiz.hearttoheartchristinerossi.com/uploads/1/3/0/8/130814328/rexutaxawuvizusuvoka.pdf
    • http://files.arrivecollegeconsulting.com/uploads/1/3/1/3/131398333/7f6c7.pdf
    • http://files.jowitz.com/uploads/1/3/0/8/130874520/bf1aa54e.pdf
    • https://cdn.shopify.com/s/files/1/0437/1356/0731/files/dikupam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuwofomakilaxenifotet.pdf
    • https://cdn.shopify.com/s/files/1/0434/5135/1200/files/ielts_reading_general_test.pdf
    • https://cdn.shopify.com/s/files/1/0437/5465/1799/files/78761839448.pdf
    • https://cdn.shopify.com/s/files/1/0434/1419/2285/files/47466014097.pdf
    • https://cdn.shopify.com/s/files/1/0429/8145/8069/files/xonoxolilesowalelanoxut.pdf
    • https://cdn.shopify.com/s/files/1/0432/7335/5424/files/placement_tests_english.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/komoronudoxikaredamotuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3101/files/how_to_get_advantage_5e.pdf
    • https://cdn.shopify.com/s/files/1/0434/9421/1750/files/pezodovewenesix.pdf
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/fupevujetizifububipas.pdf
    • https://cdn.shopify.com/s/files/1/0434/0783/5292/files/cholecystitis_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0431/7973/7237/files/kixabitabetubokujodoki.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_off00006e9a.bin
e4b7144c5c93a053910f400ee4bbd5dbb2f98760ee16f41591e331c1724d8b7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9A 5060 bytes
font_01_sfnt_off00007fab.bin
a2dd3514f49e5d448566cdba46177047bf7c5aa864abae6f475942bffbcd89c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAB 10304 bytes

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