Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cf71f5b5d00fe7c…

MALICIOUS

PDF

48.2 KB Created: 2020-07-31 20:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 442bd74d51e1da8401c5e89fd74ca804 SHA-1: 5f6eaf28d58cb9e0767121918f8f479e8347b9d9 SHA-256: 8cf71f5b5d00fe7c140ccafb934c16275645e467134b9b02d580fd5f829f2103
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 pointing to Shopify domains, which is characteristic of a link farm. One of the primary links, https://ttraff.ru/pify?keyword=hentai+age+difference, is identified as a malicious redirector. The document body is heavily obfuscated but contains this URL, suggesting the intent is to redirect users to malicious content. No scripts were extracted from this sample.

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=hentai+age+difference
    • http://files.selfhelpfromdolly.com/uploads/1/3/1/4/131437276/7676466.pdf
    • http://files.mikebauch.com/uploads/1/3/1/4/131438180/fufukewo_disepulefa_kanujuk.pdf
    • http://files.growing4hisglory.com/uploads/1/3/0/8/130874284/defavudanod.pdf
    • http://files.shoestring-lifestyle.com/uploads/1/3/0/7/130738993/rebobusefetumupu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/80124552843.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/53140805897.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/74728328285.pdf
    • https://cdn.shopify.com/s/files/1/0431/6486/0575/files/36363164844.pdf
    • https://cdn.shopify.com/s/files/1/0433/7729/5521/files/30621390342.pdf
    • https://cdn.shopify.com/s/files/1/0429/8031/1203/files/rumomejuwewapifojudo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7478/0312/files/33130780148.pdf
    • https://cdn.shopify.com/s/files/1/0432/5300/6494/files/43492470354.pdf
    • https://cdn.shopify.com/s/files/1/0440/0345/9230/files/pofanoxuzu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/jexivimiw.pdf
    • https://cdn.shopify.com/s/files/1/0439/3297/5272/files/wulumidef.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_off00008095.bin
cead5ab2cfe48634e2afb8cc672e4f71dd99c0f819f0ab4cfff070045f35c7f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8095 4940 bytes
font_01_sfnt_off0000917a.bin
2da65a51acf7ce8c8fa1714a712626693973bcfebbfb516e5d62e2aaa6ee89ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x917A 10180 bytes

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