Malicious PDF — malware analysis report

Static analysis result for SHA-256 94b5ae153fb871df…

MALICIOUS

PDF

56.7 KB Created: 2020-08-10 08:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c4d778dbe430893403379784be64cad SHA-1: 3b8effb0a4fe9fb3caee85d3a1fd63990c91fe68 SHA-256: 94b5ae153fb871df437c8de41644c022f96d7bddc7317a4fb581ca2555056c1a
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'operational amplifiers handbook pdf' and includes the malicious URL, suggesting a lure to disguise malicious activity. The presence of a link farm further indicates an attempt to distribute or redirect to 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=operational+amplifiers+handbook+pdf
    • http://files.belmontpianoacademy.com/uploads/1/3/0/7/130739831/ruduzotavu.pdf
    • http://files.cshonorsociety.org/uploads/1/3/1/3/131379042/kogupewamajevofowid.pdf
    • http://lijanane.hairandmakeupbykirsty.co.uk/uploads/1/3/1/3/131380429/wejuxenaxikemewefiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/0841/6165/files/37396201717.pdf
    • https://cdn.shopify.com/s/files/1/0438/0311/5680/files/far_out_ride.pdf
    • https://cdn.shopify.com/s/files/1/0435/1551/0938/files/17052033135.pdf
    • https://cdn.shopify.com/s/files/1/0427/6148/6503/files/4312455521.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gubiwunezekubukezo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lalosukiwafigoledexefes.pdf
    • https://cdn.shopify.com/s/files/1/0432/5346/5243/files/osho_book_of_secrets.pdf
    • https://cdn.shopify.com/s/files/1/0432/7273/2836/files/buxitugurimumosojepepo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/86526592296.pdf
    • https://cdn.shopify.com/s/files/1/0435/1793/5770/files/70270714444.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9813/files/voruduvedidanezebib.pdf
    • https://cdn.shopify.com/s/files/1/0431/6751/4788/files/2114213769.pdf
    • https://cdn.shopify.com/s/files/1/0431/7285/5967/files/pearson_american_history_textbook.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_off0000932e.bin
b3e0b6e78c2a60ce224d2fea7cf48deeb7e2ceab0bf6938bc77b58d45c433894		 pdf-font-stream PDF embedded font (sfnt) at offset 0x932E 5512 bytes
font_01_sfnt_off0000a5af.bin
078db5c45481ef3adaec1369f609379223116145ac3793e9e193d736580b1ae0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5AF 15076 bytes

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