Malicious PDF — malware analysis report

Static analysis result for SHA-256 d400675dfd78a117…

MALICIOUS

PDF

62.5 KB Created: 2020-08-19 16:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a7dea36c3ba3b93475789ec9b7c5b5f SHA-1: e339fcd716f240526bd206cfa2ee0e45280deea6 SHA-256: d400675dfd78a117dfbaf4a2c763843983690e31eb6df3f0ef8a3ea61c019cd3
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains text referencing 'Tnpsc answer key' and the malicious URL 'https://ttraff.cc/pify?keyword=tnpsc+answer+key'. This suggests the document is designed to trick users into clicking the link, likely leading to a phishing or malware download site.

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.cc/pify?keyword=tnpsc+answer+key
    • http://kabevude.vagallery.com/uploads/1/3/1/6/131636903/ravewuki-sukojisoxaked.pdf
    • http://files.makealltimetreasures.org/uploads/1/3/1/3/131384300/jovazuzupi-vejexatove-doduvozavopajon.pdf
    • http://files.roe40.com/uploads/1/3/1/8/131856627/18d79.pdf
    • https://cdn.shopify.com/s/files/1/0429/6117/4684/files/38226441453.pdf
    • https://cdn.shopify.com/s/files/1/0434/5217/0406/files/statistical_learning_stanford.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5400/files/giratipatetizozapule.pdf
    • https://cdn.shopify.com/s/files/1/0453/2695/8747/files/swearing_is_good_for_you_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ziwodukujaluladiludu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/fofulozarulilarasugo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3382/9271/files/apsu_rewa_exam_form_2018-_19.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2277/files/94386448378.pdf
    • https://cdn.shopify.com/s/files/1/0447/3962/5111/files/schistosomiasis_mansoni.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/87578051781.pdf
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/79417346652.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5093/files/duxilewamofawafosefekem.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
stream_004_off0000a1b2.bin
572d7d9463a033d138de203e6633c31374e426a28428e5f5a256e20741a72a6e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA1B2 8936 bytes
font_00_sfnt_off00009038.bin
d41f85d2cda2178a208e2ea0b3e653e940895516207eec0bf258776c22c319bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9038 5104 bytes
font_02_sfnt_off0000badc.bin
4d057b3ec72318f0251ddf65f65c8637ce53663752bb11d084ba2c8a22ac749d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBADC 16736 bytes

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