Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c89dffc93c6c956…

MALICIOUS

PDF

41.8 KB Created: 2020-08-15 00:28:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 886e0eb197b3a02fd7c96ed7f98bbcea SHA-1: 628ca3d1f88a7e4b9d9647d01e45f8ebb663f830 SHA-256: 3c89dffc93c6c95638b55edef79ecabdf90d3657ea569c7cb3b6c669fcf18b5c
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain. The document body, though heavily obfuscated, contains text related to 'ibpsguide free mock test sbi clerk', suggesting a lure for exam preparation. The primary malicious URL is a redirector, likely serving as a gateway to further malicious content or phishing pages.

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=ibpsguide+free+mock+test+sbi+clerk
    • http://files.castlesjewelry-gifts.com/uploads/1/3/1/3/131379506/0eedd9ae60d80.pdf
    • http://files.gmbcgulfport.com/uploads/1/3/0/9/130969403/vakupubaz-lodunupen-vujematuxakixad.pdf
    • https://cdn.shopify.com/s/files/1/0430/9955/3959/files/vegudoguwetejum.pdf
    • https://cdn.shopify.com/s/files/1/0435/9946/2558/files/wekubipil.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/73924173027.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/75553715215.pdf
    • https://cdn.shopify.com/s/files/1/0452/2590/2240/files/types_of_assessment_instruments.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mevebetivegukubevam.pdf
    • https://cdn.shopify.com/s/files/1/0434/1055/5034/files/vaxavoki.pdf
    • https://cdn.shopify.com/s/files/1/0436/6876/6873/files/lololavoromowobi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4020/2142/files/98102690698.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_off000058ac.bin
da6a996240b3efca3708bdf965d5ddb3e307d37b4edfa0aa8b17641632e54d59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58AC 5404 bytes
font_01_sfnt_off00006af2.bin
c94423280844240bee3a345f13e68ea406f3773cb9c4dc99d096b92042639bff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF2 14924 bytes

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