Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef3870c9791e9552…

MALICIOUS

PDF

43.0 KB Created: 2020-08-10 09:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7247fb7ac720129bf53d29d4ea89996a SHA-1: 720e7056e979e996a97f6281000c352365ae228b SHA-256: ef3870c9791e95527938cf064aa35e1337263933fe31abae0772450a397acdf4
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.com/pify?keyword=amenaza+de+aborto+causas+pdf'. Additionally, it exhibits a PDF link farm behavior, embedding numerous external PDF links, many hosted on Shopify. This suggests a social engineering attempt to direct users to malicious content through a chain of redirects.

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=amenaza+de+aborto+causas+pdf
    • http://files.foodtinerary.com/uploads/1/3/1/4/131408369/3b8c5dfc8f74a3.pdf
    • http://wukemipem.wjra.net/uploads/1/3/1/6/131636855/xopotibatus-labukise-dafomiru.pdf
    • http://wunululi.elegantmind.org/uploads/1/3/1/4/131407995/muwijevetekaso_befenit_fejuxemivetajo_ranumami.pdf
    • https://cdn.shopify.com/s/files/1/0431/2121/3591/files/27446296589.pdf
    • https://cdn.shopify.com/s/files/1/0429/0982/7231/files/39861734917.pdf
    • https://cdn.shopify.com/s/files/1/0432/8488/9758/files/50438460668.pdf
    • https://cdn.shopify.com/s/files/1/0436/2538/2051/files/stryer_biochemistry_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0437/6425/2826/files/boland_amendment.pdf
    • https://cdn.shopify.com/s/files/1/0431/8940/3810/files/sizizirox.pdf
    • https://cdn.shopify.com/s/files/1/0452/3776/4256/files/anaerobic_respiration_in_bacteria.pdf
    • https://cdn.shopify.com/s/files/1/0429/3358/4028/files/82037587464.pdf
    • https://cdn.shopify.com/s/files/1/0440/6879/8614/files/wexofomixi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/nukatiwexoxikorukimuwetod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99913566500.pdf
    • https://cdn.shopify.com/s/files/1/0432/2590/7368/files/82990827135.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_off0000660c.bin
22649c0875de302b7e0c421f063a0e4487261923a1dfa71be7e41a0e4966e5ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x660C 5448 bytes
font_01_sfnt_off0000787d.bin
74e86fc1f0c2ecea6c4b0d04106dcb3fbf0f7e781194ba04c5af273f1e7e3736		 pdf-font-stream PDF embedded font (sfnt) at offset 0x787D 11400 bytes

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