Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd79a0200343e79c…

MALICIOUS

PDF

45.7 KB Created: 2020-07-14 00:17:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba198f577b6dbdfc5ad3c8101a1c360b SHA-1: bfeeb3ce0096c84ef51af2ba33521e0e6f891229 SHA-256: fd79a0200343e79c593482de5ce5d09b7f31df5d23a5abff8ed7f873cd506b5f
150 Risk Score

Malware Insights

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

This PDF document functions as a link farm, embedding numerous links to external PDF files. The primary malicious link, 'https://ttraff.com/wb?keyword=acceleration%20word%20problems%20answer%20key%20pdf', is identified as a redirector to malicious infrastructure. The document's content and structure strongly suggest a social engineering tactic to drive traffic to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/wb?keyword=acceleration%20word%20problems%20answer%20key%20pdf
    • http://files.swimlongbrooke.com/uploads/1/3/1/6/131606256/nezasumafiposinagifu.pdf
    • http://files.unbridleddesignz.com/uploads/1/3/1/6/131607889/papijizajawis.pdf
    • http://files.thecitydesk.com/uploads/1/3/1/6/131636689/zuxofutomi_rulonuwap_kadizif.pdf
    • https://depitexexu.files.wordpress.com/2020/06/jajazizazajewovodanoxata.pdf
    • https://rigigoz.files.wordpress.com/2020/06/57090317610.pdf
    • https://wobukaf.files.wordpress.com/2020/07/xemizumaz.pdf
    • https://xitesino.files.wordpress.com/2020/07/59578964530.pdf
    • https://pinifivipivu.files.wordpress.com/2020/07/woxupetakugokolo.pdf
    • https://tujubaso421145815.files.wordpress.com/2020/07/kididegakudowolim.pdf
    • https://bularese.files.wordpress.com/2020/07/77920324071.pdf
    • https://liwigevaba.files.wordpress.com/2020/06/20362015151.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mikawewetekiwu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/54285619000.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fupibi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9866/9220/files/40973247110.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/53487067013.pdf
    • https://cdn.shopify.com/s/files/1/0428/5802/1027/files/votelusojewamamoxef.pdf
    • https://cdn.shopify.com/s/files/1/0428/4314/4359/files/jamip.pdf
    • https://cdn.shopify.com/s/files/1/0433/8886/2614/files/tosobovojatiwatavuja.pdf
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/11836807700.pdf
    • https://cdn.shopify.com/s/files/1/0433/6071/4904/files/mukuzigi.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_off00007298.bin
e44e12522d3af4da9105b1ad01b69ec7437d0fe173cc6c0c3f341ecef447c9b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7298 5476 bytes
font_01_sfnt_off00008523.bin
2ae0eeff6dfe8c7ffc5b03d3d94ac4f35ba257d394c4b3894070901f14e2a615		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8523 10632 bytes

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