Malicious PDF — malware analysis report

Static analysis result for SHA-256 24b37e4cb00b8ca3…

MALICIOUS

PDF

47.6 KB Created: 2020-07-31 12:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff59b0d1903fb859ed12f456c991b22f SHA-1: dfa2116292386fc85add307b65fca6fe8fb5881e SHA-256: 24b37e4cb00b8ca30cc3920944850f6f609f51a5dc744d4fc1f553a2f23abd59
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a high number of embedded external links, a technique commonly used to redirect users to malicious sites. One of the primary links points to a known malicious redirector infrastructure. The document body is heavily obfuscated and appears to be a byproduct of the PDF generation tool rather than user-facing 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=ndebele+orthography+pdf
    • http://files.learningtoreadbyreading.com/uploads/1/3/1/1/131163859/tivivifasilip-rivowavevorobel-rosozubifajubo.pdf
    • http://files.centralmathshub.com/uploads/1/3/1/4/131408056/baxoraf.pdf
    • http://files.brianwhitson.me/uploads/1/3/2/7/132710630/feturopunuzox-lomeparene-petasopudi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9462/9788/files/26866597808.pdf
    • https://cdn.shopify.com/s/files/1/0434/1124/3162/files/73217980565.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/10725584311.pdf
    • https://cdn.shopify.com/s/files/1/0437/5068/6874/files/sukesarow.pdf
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/pizuwofukutisuxegosin.pdf
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/2056798034.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/51671929333.pdf
    • https://cdn.shopify.com/s/files/1/0432/5877/3662/files/vabejove.pdf
    • https://cdn.shopify.com/s/files/1/0430/8058/1274/files/guxebakadebovokaxalogavo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6958/8127/files/95492759932.pdf
    • https://cdn.shopify.com/s/files/1/0429/5625/9491/files/96507792717.pdf
    • https://cdn.shopify.com/s/files/1/0434/5636/4711/files/57593740769.pdf
    • http://hdl.handle.net/10646/549
    • 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/
    • https://cdn.shopify.com/s/files/1/0429/9633/4

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007be7.bin
b9cb72af9cc46a582b8966daa8fe4125efad3f49588fcf597e746f4a0447ff1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE7 4972 bytes
font_01_sfnt_off00008cee.bin
63f39afa2760c978c294d8bf898d8e068cdc5edbd2ed0a571c50e96ade698894		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CEE 10596 bytes

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