Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa0c602b0608df94…

MALICIOUS

PDF

44.3 KB Created: 2020-07-09 11:36:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bd100c461a2c22be6cb188ebedd8d47 SHA-1: b3f1d212a8cdffef825a81ae5870ed1222700c53 SHA-256: aa0c602b0608df94e1e4899184f5cfcdc66ece6eb2cb5be05a727c0fe3f90729
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a redirector link to 'ttraff.cc' and a large number of links pointing to various file-hosting domains. The heuristic firings indicate that these links are part of a malicious redirector and a link farm, designed to lead users to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=lettera+dimissioni+con+preavviso+pdf
    • http://files.radioramadhan.scot/uploads/1/3/1/4/131453045/7340182.pdf
    • http://files.yogawithjw.com/uploads/1/3/1/4/131454634/8500066.pdf
    • http://files.todayhousing.com/uploads/1/3/0/9/130969243/vanamogukalazak.pdf
    • http://files.herrmanndj.com/uploads/1/3/1/4/131454272/lagelar-ditabo-zumufe-fimofi.pdf
    • http://files.bridgestonecounseling.com/uploads/1/3/0/8/130874035/6464309.pdf
    • http://files.ncam.ac.nz/uploads/1/3/0/7/130776788/a94fe6a1c2f25a.pdf
    • http://files.kmpinner.com/uploads/1/3/0/7/130739764/nukafewipumeruwoniz.pdf
    • http://files.mcnairycountytn.org/uploads/1/3/1/4/131407857/8efacbbf.pdf
    • http://files.gracemiddletownde.com/uploads/1/3/0/9/130969404/danaxiz.pdf
    • http://files.mrogrady.com/uploads/1/3/1/6/131606762/b5754a4.pdf
    • http://files.hcwildlife.ca/uploads/1/3/2/7/132711965/a0281e28.pdf
    • https://miserowage857454741.files.wordpress.com/2020/06/66367064302.pdf
    • https://riduvetixaxu.files.wordpress.com/2020/07/36870962120.pdf
    • https://nuvomisegej.files.wordpress.com/2020/07/pofufujugus.pdf
    • https://zetamuse.files.wordpress.com/2020/07/vozidunigobozowebigoxira.pdf
    • https://gepuwovu.files.wordpress.com/2020/06/duvatijajorodativogenomok.pdf
    • https://fopumetuleg.files.wordpress.com/2020/07/muretujufefujaliwo.pdf
    • https://suzofosal.files.wordpress.com/2020/06/jeredozakorotogoganuzofis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voxetevew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mufuma.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99231100330.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72710717911.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_off000070fd.bin
e9f818ef120cdc80e6837edb74af8ceeedf71e751276b0e81b6b4a3a86a155d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70FD 5056 bytes
font_01_sfnt_off00008216.bin
9fb1b5c83a6dd4370315704ddc82984f08be0410355a8663e75ac647c93ddae7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8216 10296 bytes

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