Malicious PDF — malware analysis report

Static analysis result for SHA-256 75d485c7cdbb665a…

MALICIOUS

PDF

63.7 KB Created: 2020-08-17 11:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e1de33dadb5509aa162bef968093633 SHA-1: 2778ccefebf401139fe707d41e29db22c088f6dc SHA-256: 75d485c7cdbb665aad1f08eb26a2641721a7a1ee9bf9835cdef01b84bb4ef225
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links designed to redirect users to malicious infrastructure, specifically identified by the 'ttraff.cc' domain. The document body, though partially corrupted, includes text related to learner's license questions, suggesting a lure for phishing or scam purposes. The ML classifier strongly indicated maliciousness, and the presence of numerous external links points to a link farm or SEO manipulation tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=learners+license+questions+and+answers+in+malayalam
    • http://nepuwog.illininavs.org/uploads/1/3/1/4/131407797/9618d04e3f38.pdf
    • http://bikezojim.rrwomensclub.org/uploads/1/3/0/7/130740596/c266dcd7a9fe.pdf
    • http://files.makechangeawards.com/uploads/1/3/0/8/130815014/5931cb4b.pdf
    • http://files.thebeardedcardtrader.com/uploads/1/3/0/7/130740202/6516530.pdf
    • http://files.hooksflyinghranch.com/uploads/1/3/1/3/131380107/8642605.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102Hussain
    • http://smc.org.inhttp://smc.org.in
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/finutup.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/xawixowekasisuto.pdf
    • https://cdn.shopify.com/s/files/1/0437/0071/5674/files/miracle_in_cell_no._7_yts.pdf
    • https://cdn.shopify.com/s/files/1/0439/2042/5115/files/what_is_onenote_printer.pdf
    • https://cdn.shopify.com/s/files/1/0439/3598/9915/files/icy_veins_mistweaver.pdf
    • https://cdn.shopify.com/s/files/1/0439/5306/2043/files/28381242811.pdf
    • https://cdn.shopify.com/s/files/1/0428/1001/5910/files/making_dilutions_worksheet_answer.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7394/files/larson_precalculus.pdf
    • https://cdn.shopify.com/s/files/1/0434/1137/4230/files/lulivunotolewok.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/
    • http://scripts.sil.org/OFL
    • https://gitlab.com/smc/meera/blob/master/COPYING

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009f72.bin
85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F72 2828 bytes
font_01_sfnt_off0000a96c.bin
58d46f93b374f63d9bfe3dc0623911c75f14570a40b160e1fde35b9884156a97		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA96C 5348 bytes
font_02_sfnt_off0000bb86.bin
781f74c388601a9b2f9f2fd904e63f494b0e2712eb4cb30979216b1df5e568a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB86 4584 bytes
font_03_sfnt_off0000ccbc.bin
f044d5a5075b2ec1ab613b9239b7fbc760d67b39d50866708ae400d7ce25e958		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCBC 10524 bytes

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