Malicious PDF — malware analysis report

Static analysis result for SHA-256 441b843a826e3940…

MALICIOUS

PDF

43.2 KB Created: 2020-08-14 07:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8184627bb72934abf46b62f0ce7a6d78 SHA-1: 924b1bc1d6582640873ad55c4be175f7962dc9c7 SHA-256: 441b843a826e394028059b6bb3cf0040bac4190b49b63ea52211213923b95062
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to direct users to malicious sites. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=eclipse+cdt++zip'. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on various domains, suggesting a link farm or redirection scheme. The primary attack pattern is to lure users into clicking these links, which likely lead to further malicious content or exploits.

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=eclipse+cdt++zip
    • http://vedifa.machinesbygoldcrest.co.uk/uploads/1/3/0/8/130874642/tegiwevafem.pdf
    • http://files.peschketruckinginc.com/uploads/1/3/0/7/130775992/vijinajus_kolep.pdf
    • http://tatika.secondwind.org/uploads/1/3/1/0/131070722/wanosoli.pdf
    • http://files.westmountwildrugby.com/uploads/1/3/1/4/131407263/wobama.pdf
    • http://lawag.lonelymountainfilms.com/uploads/1/3/2/6/132695471/vetawaresik.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/binary_search_tree_python.pdf
    • https://cdn.shopify.com/s/files/1/0427/7351/2359/files/33425614519.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/94355294943.pdf
    • https://cdn.shopify.com/s/files/1/0437/3633/4501/files/nuwujipanokiwisuja.pdf
    • https://cdn.shopify.com/s/files/1/0437/8699/3813/files/21946307383.pdf
    • https://cdn.shopify.com/s/files/1/0440/1987/5998/files/barking_up_the_wrong_tree_eric_barker.pdf
    • https://cdn.shopify.com/s/files/1/0433/6769/4501/files/91437592736.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/beatboxing_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0428/4550/3655/files/guitar_power_cord_chart.pdf
    • https://cdn.shopify.com/s/files/1/0430/8336/6551/files/free_autumn_word_search.pdf
    • https://cdn.shopify.com/s/files/1/0433/4921/3349/files/52471333030.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/98207870960.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6166/files/97723627096.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/4463623185.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006131.bin
a8c46ceaf00ff3db9acd75ae073af8992ba2b2e4eb707cccc1e2bb5967be4663		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6131 4340 bytes
font_01_sfnt_off00006fff.bin
79b044fb65e8fe20070f594aa5cbf0d649775a77bf800d6c145ae0496742c30e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFF 9852 bytes
font_02_sfnt_off000091cd.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91CD 4324 bytes

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