Malicious PDF — malware analysis report

Static analysis result for SHA-256 1193119b9f8a0f7d…

MALICIOUS

PDF

43.4 KB Created: 2020-08-18 22:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6efd3ef5116e6adabf21d8822ed51c0 SHA-1: e4761fb32dabc32f58c4c4a3d4a9288be4212d5e SHA-256: 1193119b9f8a0f7de77c8228eadebc323bfa89974c1dfbee7f4c666384da6af7
162 Risk Score

Malware Insights

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

This PDF document contains a malicious redirector link disguised as a practical manual download. The link, https://ttraff.cc/pify?keyword=12th+zoology+practical+manual+english+medium+2019, leads to known malicious infrastructure. The document also features a link farm of 16 PDF files, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=12th+zoology+practical+manual+english+medium+2019
    • http://files.sapphirestarseedart.com/uploads/1/3/1/3/131379042/xunuwitatepataxofiru.pdf
    • http://files.s-gholidays.co.uk/uploads/1/3/1/4/131406780/mapiruwiwu-miwodejebeki-nujejuzarobiwa.pdf
    • http://files.harthillhospitality.com/uploads/1/3/1/8/131871633/zokefidax.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4550/2626/files/febubodupemadunuwogu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2479/files/introduction_to_functional_grammar_halliday.pdf
    • https://cdn.shopify.com/s/files/1/0432/0981/8280/files/denoxemodirafame.pdf
    • https://cdn.shopify.com/s/files/1/0434/5937/9357/files/le_brassage_genetique.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3399/files/1650453945.pdf
    • https://cdn.shopify.com/s/files/1/0432/9095/1848/files/alprazolam_1mg_bula.pdf
    • https://cdn.shopify.com/s/files/1/0437/0815/4008/files/geporadoruvoxamemaxef.pdf
    • https://cdn.shopify.com/s/files/1/0436/7689/3334/files/i_m_your_little_butterfly.pdf
    • https://cdn.shopify.com/s/files/1/0438/0616/3104/files/chuyen_hinh_sang_word.pdf
    • https://cdn.shopify.com/s/files/1/0433/7470/6853/files/82145851482.pdf
    • https://cdn.shopify.com/s/files/1/0433/6772/7269/files/zapiwimapudivogebumez.pdf
    • https://cdn.shopify.com/s/files/1/0432/9121/3980/files/toximuvewuvujiruzer.pdf
    • https://cdn.shopify.com/s/files/1/0437/6150/0318/files/3ds_max_crack.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006929.bin
dff3479797c0e8f943923b4f17003dc88e1b882db15c4c5ad42b628871826698		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6929 6024 bytes
font_01_sfnt_off00007d90.bin
9eff392e047432cf146b28dfd371069da3d7f8bcdf3a4f7e4d70587b1adbbb3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D90 10296 bytes

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