Malicious PDF — malware analysis report

Static analysis result for SHA-256 23eca904c5a1764f…

MALICIOUS

PDF

53.0 KB Created: 2020-08-25 15:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 856919b2e72b17c28a843a26ab098e7e SHA-1: 925dfe528c02520568850014d91f73ecfdf5f779 SHA-256: 23eca904c5a1764ffe1ec68f68dd4cf4df548ffd92084c99f4c50de8b02c4e32
120 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a review for antivirus software. The document body includes the target URL and numerous other PDF links, suggesting a link farm or redirection tactic. The primary malicious IOC is the redirector URL, which likely leads to further malicious 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.cc/pify?keyword=sophos+free+antivirus+android+review
    • http://files.brooklynbbfl.com/uploads/1/3/2/6/132681772/3e6eabcf.pdf
    • http://files.acceleratenewenglandwomen.com/uploads/1/3/1/1/131164372/1121372.pdf
    • http://nopene.tsrenovationgroupllc.com/uploads/1/3/1/0/131070374/gozajutomoxamebo.pdf
    • http://kenixila.slcwrestling.com/uploads/1/3/1/0/131070374/gikirezuzap-sogogogi-wonimiligitigav-kujatetiw.pdf
    • http://files.travelingtolearn.com/uploads/1/3/1/4/131437535/30af65.pdf
    • https://cdn.shopify.com/s/files/1/0451/3090/7813/files/40516195902.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0994/files/wigimimodunezebopobinutem.pdf
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/pc_assembly_and_disassembly_step_by_step.pdf
    • https://cdn.shopify.com/s/files/1/0431/0715/6128/files/jurnal_tentang_bblr.pdf
    • https://cdn.shopify.com/s/files/1/0435/8835/4207/files/97974529066.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1651/files/behaviourist_approach_to_learning.pdf
    • https://cdn.shopify.com/s/files/1/0433/9784/1054/files/44602514466.pdf
    • https://cdn.shopify.com/s/files/1/0439/4834/3464/files/bayatilar_yukle.pdf
    • https://cdn.shopify.com/s/files/1/0445/4429/5076/files/pneumatic_cylinder_working_principle.pdf
    • https://cdn.shopify.com/s/files/1/0436/5592/1822/files/fofiwepebakomuliwovix.pdf
    • https://cdn.shopify.com/s/files/1/0430/1117/8649/files/75173695483.pdf
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/92458815199.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_off00009157.bin
7373f00ddbfc1e01274f8aed1398d661eec37dfdbed36f5d10d26b188dc75956		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9157 5352 bytes
font_01_sfnt_off0000a396.bin
f251ab3c6113c5f28e5071f95f871c63037ff2ea1344caa13f9851401295da37		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA396 10288 bytes

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