Malicious PDF — malware analysis report

Static analysis result for SHA-256 abaf2da72bf9aa16…

MALICIOUS

PDF

42.1 KB Created: 2020-08-22 22:27:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0333ab2bfc82c7f4d00e5d35f90848b SHA-1: 512f4135d1e6eff24f08d2e33945d1f240705d9b SHA-256: abaf2da72bf9aa1691b87086bf16538f9710c5e99fe8c541d79233c65fee6d7b
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to external resources, a common tactic for SEO link farms. One prominent link, 'https://ttraff.ru/pify?keyword=avast+secure+browser+for+android', is identified as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution, under the guise of a software download. No scripts were extracted, but the PDF structure and URL analysis strongly indicate a malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=avast+secure+browser+for+android
    • http://veteda.globalwends.com/uploads/1/3/1/0/131070420/namitu.pdf
    • http://nolilud.karenfeiling.com/uploads/1/3/0/9/130969465/vaxuvidotefolebexo.pdf
    • http://govujovew.utterlyuncluttered.com/uploads/1/3/0/7/130776791/xizagesuropuz.pdf
    • http://files.kansashistoryday.org/uploads/1/3/1/4/131409498/5611fbe666822.pdf
    • http://dokib.kathrynamcmahon.com/uploads/1/3/1/3/131398091/6308527.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/luzabozuwalupokiruzidozi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/nupetidolarewepele.pdf
    • https://cdn.shopify.com/s/files/1/0463/2435/1131/files/animal_store_food_in_the_form_of.pdf
    • https://cdn.shopify.com/s/files/1/0440/8056/2326/files/astaghfar_ki_fazilat_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/lunozopetilixemejever.pdf
    • https://cdn.shopify.com/s/files/1/0430/3706/5370/files/medical_microbiology_mcqs.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6152/files/48150728603.pdf
    • https://cdn.shopify.com/s/files/1/0437/7811/3697/files/kupapimakasufewi.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_off000066a5.bin
9363aa586a18c748979f05ee4da03dfe7e7d35e1b4133ce1dd33fec9f351333f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A5 5264 bytes
font_01_sfnt_off000078a3.bin
29c53fec647044543e39e48aabf3670fc78d50b3baa3bcccce08d42d0f756b30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78A3 10276 bytes

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