Malicious PDF — malware analysis report

Static analysis result for SHA-256 cac4bf73fc875aca…

MALICIOUS

PDF

37.9 KB Created: 2020-08-16 15:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69b0838789e7c4d72f0e33eb84cee3f8 SHA-1: ccbaadfc5379510a07853b4efd36d921896e1ee4 SHA-256: cac4bf73fc875aca31b2ae4729a3ffcbb4f2d2912e7aac1c0720576ec79ec61f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=year+end+summary+report'. This URL is presented within the document body as a "year end summary report", indicating a social engineering lure. The file also contains a large number of embedded links, many hosted on Shopify, suggesting a link farm or distribution mechanism. The primary malicious IOC is the redirector URL.

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=year+end+summary+report
    • http://files.lambfarmdesigns.com/uploads/1/3/0/8/130813846/pawevi.pdf
    • http://soxiv.sylviashanahan1.com/uploads/1/3/1/0/131071041/4654233.pdf
    • http://dekepekev.kosative.com/uploads/1/3/1/4/131452824/a55b5fc.pdf
    • https://cdn.shopify.com/s/files/1/0435/4143/0440/files/rexoxadopodizujulub.pdf
    • https://cdn.shopify.com/s/files/1/0434/8959/1461/files/tebamebugi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2544/9628/files/tawawujugapixomuxusa.pdf
    • https://cdn.shopify.com/s/files/1/0433/1002/2814/files/delafifesotunegafewofev.pdf
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/psc_bulletin_december_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5744/files/vitakexabududozatudazo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5771/6117/files/23777191982.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/rabivur.pdf
    • https://cdn.shopify.com/s/files/1/0439/7803/1262/files/govejafapavazidebizit.pdf
    • https://cdn.shopify.com/s/files/1/0428/4969/7959/files/beaver_rv_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/estatuto_anticorrupcion_2020.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_off00005a54.bin
ddc59c226189f8b114a1dd7ccb4239c2eaca9afdd9f0d7b0ad0d023c6a5d6027		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A54 5136 bytes
font_01_sfnt_off00006bb8.bin
8504c13ac0c2b9ae83673e4e81c03b0093d60012afed8c3ed82b4da37f1871df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB8 9232 bytes

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