Malicious PDF — malware analysis report

Static analysis result for SHA-256 4512d1bcbb36acab…

MALICIOUS

PDF

31.6 KB Created: 2020-09-06 01:24:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60f1295d407f47180bc74ffe449fe7cf SHA-1: 9d2bd9f24b764a0dc4ef31dd2202b017403eabd9 SHA-256: 4512d1bcbb36acabd71fa468d5792fee25338713ee2c323d0f9f03c0f319b3c9
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate that this is likely an SEO link farm, designed to manipulate search engine results or redirect users to malicious content. The primary malicious IOC is the redirector URL, which is likely the initial point of contact for a malicious payload or phishing attempt.

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.link/wix?keyword=cd+chiclete+com+banana+as+melhores
    • https://cdn.shopify.com/s/files/1/0444/0604/6886/files/text_2_speech.pdf
    • https://cdn.shopify.com/s/files/1/0427/6345/2583/files/ravufalazabefamutovugefut.pdf
    • https://cdn.shopify.com/s/files/1/0428/4419/2935/files/9757607585.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4329/files/wodugiperamuwaruzu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4050/4999/files/bonjour_tristesse_english_translation.pdf
    • https://cdn.shopify.com/s/files/1/0468/8743/6445/files/87645657861.pdf
    • https://cdn.shopify.com/s/files/1/0437/5507/7781/files/34736442011.pdf
    • https://cdn.shopify.com/s/files/1/0435/9867/6131/files/35958785169.pdf
    • https://static.usrfiles.com/ugd/c836c3_a32bdcfacdf14711b9c2640d67823dc1.pdf
    • https://static.usrfiles.com/ugd/dd6616_8982920482694ae18583f116d4463f1b.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fb2fd4edc2844a7b26d68894e4b97a7.pdf
    • https://cdn.shopify.com/s/files/1/0428/2456/4902/files/jobapozagexitobel.pdf
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/wajafazapozisopaw.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_off00003f1c.bin
d88f7fe17abb2d494697aff36b24c9d2acc71fa799cebb12367f3f0b74116794		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3F1C 5224 bytes
font_01_sfnt_off000050a4.bin
c090813d91369e2f1305ec2ea06cdfb828960a698b5760ec80ec4b94e39992dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50A4 9940 bytes

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