Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5131b41e72c13d1…

MALICIOUS

PDF

97.5 KB Created: 2020-09-17 09:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fa8c51c49f4702c16bcd9ed82a4b603 SHA-1: c236c2a3cc4e808ca9b9e3f0e724af203b089d2e SHA-256: d5131b41e72c13d1870a78b1ddccd5b075856af752b701adcc7d421200026004
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to potentially malicious redirectors. One such link, 'https://ttraff.me/wix?keyword=homeowners+association+audit+guide', is explicitly flagged as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to trick the user into visiting this malicious site. No scripts were extracted, and the PDF structure itself is the vector for the attack.

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.me/wix?keyword=homeowners+association+audit+guide
    • http://sarowug.iybibarberstudio.shop/uploads/1/3/0/7/130739443/75847df7.pdf
    • http://files.swfoutfitter.com/uploads/1/3/0/9/130969191/rebelawudezezuguwaf.pdf
    • http://files.bellacalore.com/uploads/1/3/0/8/130814279/mumubimogamu-fupedevumebat-ropetiwajo.pdf
    • http://xuvoruju.reflectingonheartfailure.com/uploads/1/3/1/4/131406063/aa05df8a4895.pdf
    • http://nedep.compliancemastersllc.com/uploads/1/3/2/6/132683008/xajiterikorabof-sodupekosusax-gofagozoxuba.pdf
    • https://cdn.shopify.com/s/files/1/0429/8165/4679/files/scope_of_work_construction_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/8140/8420/files/zemisufim.pdf
    • https://cdn.shopify.com/s/files/1/0464/7649/2952/files/57257362352.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/autocad_print_to.pdf
    • https://cdn.shopify.com/s/files/1/0432/5864/2595/files/bebofinefigovujej.pdf
    • https://cdn.shopify.com/s/files/1/0463/1517/6096/files/ficha_tecnica_de_raven_escala_general.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2072/files/75750404763.pdf
    • https://cdn.shopify.com/s/files/1/0438/4735/2480/files/radidoki.pdf
    • https://cdn.shopify.com/s/files/1/0435/0246/9285/files/fourier_transform_of_sinc_function_matlab_code.pdf
    • https://cdn.shopify.com/s/files/1/0433/3040/4502/files/dobuk.pdf
    • https://290e07e5-5190-411e-8da9-1a94724851ac.filesusr.com/ugd/daca0d_e392e39848da4d0797c8bfb60fdc84ad.pdf?index=true
    • https://d856284f-7943-4798-8b2e-e6b4a919d369.filesusr.com/ugd/d4da64_ef65713034cd41cfaaf294f6a193478b.pdf?index=true
    • https://2657b5b5-a897-414b-8786-2c0e02b00615.filesusr.com/ugd/6924eb_6d8b0ca37b5249bf8e83e82652f3cc0c.pdf?index=true
    • https://82a41c8c-b3f9-4bb5-b401-bed50e866886.filesusr.com/ugd/28146e_255edcf5a77745a98a125e691640f9a6.pdf?index=true
    • https://1de5f78d-fb8d-4477-9ff2-59abc8e372b1.filesusr.com/ugd/43d598_843839ed58ea431b85af770ead668548.pdf?index=true
    • 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_off00014324.bin
af39b802ea128f8bde78e71886b8c860f9f9eb7b11712496443c5b02524bab36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14324 5280 bytes
font_01_sfnt_off0001550d.bin
3e487e680b48f4c7022d9aa559c816b0aa1b1d41d2f7c336070ed141f3621b55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1550D 10428 bytes

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