Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aa2587a89a60b0e…

MALICIOUS

PDF

57.8 KB Created: 2020-08-19 21:03:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 752d75b9af2c1f286a0aea85577076dc SHA-1: bed7f9d9bfd1d9a75da55762549f41f58e5cea9b SHA-256: 3aa2587a89a60b0e2b40fbc6a8303903a4580c82f45f02fa44af79d1e4721f83
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including Shopify. One of the primary links directs to a known malicious redirector. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, suggesting it's not a legitimate document. The presence of a malicious redirector and a link farm indicates an attempt to drive traffic to potentially harmful 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.com/pify?keyword=aeriforme+etimologia+griega
    • http://latoti.americanfamilyfeed.com/uploads/1/3/2/7/132712324/fasigej_fugawaneb_towake.pdf
    • http://pegefedom.latin-numbers.com/uploads/1/3/1/3/131381428/648dc.pdf
    • http://files.whitegallowaysofwayby.com/uploads/1/3/0/8/130873907/fewubogukobavel-sixomolimu-mifip.pdf
    • https://cdn.shopify.com/s/files/1/0433/8063/7861/files/20093176578.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/xanivod.pdf
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/lufepirimegefamimobusuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2813/files/warufusupuletitibekotem.pdf
    • https://cdn.shopify.com/s/files/1/0430/8733/1481/files/23250505983.pdf
    • https://cdn.shopify.com/s/files/1/0436/8800/1689/files/20895640602.pdf
    • https://cdn.shopify.com/s/files/1/0432/0601/7185/files/co_worker_synonym.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/upsc_cds_ota_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0434/4191/4006/files/44331692970.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/carbon_nanotubes_in_concrete.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076f9.bin
24c3893558dcacf72ba56d4818f6511a26ef1d7ba1d5adb4619cf439f3f39c4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F9 4900 bytes
font_01_sfnt_off0000878a.bin
954aa1599645506449a37caac623d7062516eeec3cd8a998b665f401276abcb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x878A 22600 bytes
font_02_sfnt_off0000c376.bin
fbea06e9a983e9a8ab4110dc1b1a2d0262c93ae4d21686d7de7b99c87c14192f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC376 16520 bytes

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