Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f24a4599161a7d…

MALICIOUS

PDF

38.7 KB Created: 2020-08-02 05:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b63d34a0ee84807422267b33693ec45 SHA-1: bf9c0626a3f064d16693134d0aa67612cb63adc8 SHA-256: a3f24a4599161a7defe211fa4ea75820893918e7285d018313ce5a11ca88114e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in Systems T1059.001 PowerShell

The PDF contains numerous links to external resources, many of which are hosted on Shopify and appear to be part of a link farm designed to manipulate search engine results. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/wb?keyword=addition%20and%20subtraction%20within%201000%20pdf'. This suggests the document's primary purpose is to drive traffic to malicious or potentially malicious sites, possibly for phishing or malware distribution.

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/wb?keyword=addition%20and%20subtraction%20within%201000%20pdf
    • http://files.danegeld.co.uk/uploads/1/3/2/6/132696174/1741964.pdf
    • http://files.tcrcatering.com/uploads/1/3/2/6/132681294/7907111.pdf
    • http://files.marieesposito.info/uploads/1/3/0/8/130874085/jejulefe.pdf
    • http://files.pawsandlove.net/uploads/1/3/0/8/130814515/bomakofez.pdf
    • https://cdn.shopify.com/s/files/1/0438/0858/7933/files/80301509111.pdf
    • https://cdn.shopify.com/s/files/1/0432/5110/5947/files/40373476317.pdf
    • https://cdn.shopify.com/s/files/1/0429/7742/7609/files/zumafiwetifotesiwuvetosok.pdf
    • https://cdn.shopify.com/s/files/1/0437/8283/2280/files/21062651118.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5254/files/lujobavetowajo.pdf
    • https://cdn.shopify.com/s/files/1/0441/0834/9592/files/61534626231.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/xokonozidivirimubifefor.pdf
    • https://cdn.shopify.com/s/files/1/0433/5393/1944/files/17662958401.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/fapabo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7129/files/kijotupa.pdf
    • https://cdn.shopify.com/s/files/1/0436/9167/1705/files/22734118973.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_off000058b0.bin
6d6e7f3e629a31eebf4522a83233ba2bf8c39e8ffd21d6dfa382e9d775951695		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58B0 5628 bytes
font_01_sfnt_off00006bde.bin
00b23ade3ebf6390260e238be04458524bfa42215ac851389e511963a914544d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDE 9928 bytes

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