Malicious PDF — malware analysis report

Static analysis result for SHA-256 9231efd1a0f59763…

MALICIOUS

PDF

55.4 KB Created: 2020-08-05 08:24:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b11a9a86aac135838598f85412689ab SHA-1: 4483e8ad0d38550152ba02214efa839fb88e1dbf SHA-256: 9231efd1a0f5976315c45fb58b4b61957388b4acc73ab27cbe91b84c8f02b905
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, many of which point to a redirector service known for malicious activity. The primary malicious URL identified is https://ttraff.cc/pify?keyword=renin+angiotensin+aldosterone+system+%25E0%25B8%2584%25E0%25B8%25B7%25E0%25B8%25AD+pdf. This suggests the document is designed to trick users into visiting malicious sites, likely for phishing or malware distribution. No scripts were extracted, and the document body was heavily obfuscated.

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=renin+angiotensin+aldosterone+system+%25E0%25B8%2584%25E0%25B8%25B7%25E0%25B8%25AD+pdf
    • http://files.jonesphysicaltherapy.com/uploads/1/3/2/7/132740408/d2f49286e2099.pdf
    • http://files.mgle-germanschool.org/uploads/1/3/2/8/132814898/4323125.pdf
    • http://files.mybrightdelights.com/uploads/1/3/1/4/131483317/5c5e3e7b38eeea5.pdf
    • http://files.sapientboutique.com/uploads/1/3/0/7/130775199/e5cec3e725.pdf
    • http://files.welcomeinspections.com/uploads/1/3/0/7/130740442/347ecca.pdf
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/31954952235.pdf
    • https://cdn.shopify.com/s/files/1/0430/4276/7001/files/77275959464.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kilezolesosobusafo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/dolibakajoxilisewapuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vazakiliduvapi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9183/6566/files/31991068408.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rirolor.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/black_demon_shark.pdf
    • https://cdn.shopify.com/s/files/1/0430/2707/1127/files/zivumugi.pdf
    • https://cdn.shopify.com/s/files/1/0438/5754/3328/files/siluzatefimibukibalok.pdf
    • https://cdn.shopify.com/s/files/1/0432/1869/8400/files/cambridge_pet_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/xuwivigibipowebep.pdf
    • https://cdn.shopify.com/s/files/1/0429/6356/6755/files/mubiso.pdf
    • https://cdn.shopify.com/s/files/1/0430/8641/3985/files/95622899448.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000767f.bin
f7052f8467828f1d487acc60df47d8269e4cf6267f3d309bafdd257f393a7289		 pdf-font-stream PDF embedded font (sfnt) at offset 0x767F 5472 bytes
font_01_sfnt_off0000890d.bin
cd5e481ffdf456c14e1948f217ee0edb361ceca691f28702da075feefd01b6a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x890D 6180 bytes
font_02_sfnt_off00009908.bin
ab6052010e8c05e71b1f9a2b9634a0680d6a11c74fd6e4228b5b294fb0408347		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9908 6732 bytes
font_03_sfnt_off0000aacd.bin
b5ebd627ec87fdc2da587dc62c29ba9ebb4aa71927e6c2b8246a61e1ae977f68		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAACD 10008 bytes

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