Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f0e3d339fbd2387…

MALICIOUS

PDF

44.3 KB Created: 2020-07-31 09:25:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffe02fbf62d4bd5709de64cd344a85db SHA-1: c9a17d61a4c6b82cf576e66882c773089beea38d SHA-256: 4f0e3d339fbd238711e922c81a29abb115c432dfee16cdb6464f5b5f323016f4
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'general chemistry practice test with answers pdf', suggesting a lure. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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=general+chemistry+practice+test+with+answers+pdf
    • http://files.salembrewsupply.net/uploads/1/3/0/7/130740255/073530.pdf
    • http://files.muddyriverhomestead.com/uploads/1/3/2/6/132682142/2235402.pdf
    • http://files.greenhopefinearts.org/uploads/1/3/0/7/130775647/rutogafilekujar_gagogigopoda_kaxipo_welinozeme.pdf
    • https://cdn.shopify.com/s/files/1/0434/3031/4133/files/41370894213.pdf
    • https://cdn.shopify.com/s/files/1/0432/7741/8656/files/42054549707.pdf
    • https://cdn.shopify.com/s/files/1/0438/3506/4477/files/womezisudirimuxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/panezebafaburivotupete.pdf
    • https://cdn.shopify.com/s/files/1/0432/5320/3104/files/24889569259.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/92049250886.pdf
    • https://cdn.shopify.com/s/files/1/0431/0663/1833/files/towebexinokotonivok.pdf
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/28427075430.pdf
    • https://cdn.shopify.com/s/files/1/0428/7106/2684/files/bofikevogeneviwajuseguwe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6118/2617/files/xudonifipexivigoverefamow.pdf
    • https://cdn.shopify.com/s/files/1/0429/3342/0195/files/gekaduruvinunivuxavid.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3981/files/bogadenu.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_off00006f5f.bin
044d3fba70d0facb18b96e68c95a576512a3071d05f99a09da6a33fac9d2d817		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5F 5296 bytes
font_01_sfnt_off00008146.bin
f2a66ea576235271985737d9872f94823a9893dc2471aff96897a4abc21fafda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8146 10240 bytes

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