Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e4501e0a221423a…

MALICIOUS

PDF

40.5 KB Created: 2020-08-08 00:42:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f3d747c0d2ac959965984ceb46f09ee SHA-1: 1db7be410aedd2d7f055e398d145ceef4b9fd1f1 SHA-256: 3e4501e0a221423ad25aca9ec47a0368e95f029918e9d8c3acf96914b0d2922c
120 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a biology quiz download, which is a common social engineering tactic. The document body and embedded links suggest a link farm designed to redirect users to potentially malicious sites. The primary malicious IOC is the ttraff.ru redirector URL.

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=biology+multiple+choice+questions+pdf+download
    • http://dipom.sallyjaneheit.com/uploads/1/3/1/0/131070718/78a8bb387.pdf
    • http://files.medeye.net/uploads/1/3/0/9/130969045/gonovifotisewu-vukagamufimoro.pdf
    • http://turane.donwilsonodhiambo.com/uploads/1/3/1/6/131606349/wapelinupik-bobuzoxupep-wusidad-luzowelab.pdf
    • http://files.accipitercycles.com/uploads/1/3/1/3/131398308/jegiwekonurudamomir.pdf
    • http://files.didodey.com/uploads/1/3/1/3/131398139/fepawifezazenuviwed.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/80944799640.pdf
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/6467891131.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/lawegixokotafigutad.pdf
    • https://cdn.shopify.com/s/files/1/0434/8218/5893/files/fake_job_offer_letter.pdf
    • https://cdn.shopify.com/s/files/1/0433/2873/3352/files/madifubaperejoxidapilu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1241/3851/files/barracuda_email_security_gateway_400.pdf
    • https://cdn.shopify.com/s/files/1/0433/7932/7126/files/70058262691.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/55364399747.pdf
    • https://cdn.shopify.com/s/files/1/0429/8076/9951/files/poxiniziw.pdf
    • https://cdn.shopify.com/s/files/1/0430/9375/4009/files/jasumiwuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/javabu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6908/6623/files/tokesuterixitoriju.pdf
    • https://cdn.shopify.com/s/files/1/0431/4749/3536/files/54210203767.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_off00005ec7.bin
a3b15ca046bef6fbf32c5cea62a5a1a144834a3ab46fd2544b02ef110005a02f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC7 5840 bytes
font_01_sfnt_off0000729d.bin
8ae4cfb58b006d01625c8bfb151a648fd1bbd34b1dee77d6bcfc8845f383152f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x729D 9984 bytes

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