Malicious PDF — malware analysis report

Static analysis result for SHA-256 609f13fdcfbd2559…

MALICIOUS

PDF

46.5 KB Created: 2020-09-03 09:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a1ab6bc053a721e423e10366dbd0e86 SHA-1: f0b9bfdacd87cfde33fa70b21ccd7ce6ae0c7b1e SHA-256: 609f13fdcfbd2559eace098995cacf1dfe8836c14c9d9bdae4017bbf0b84be97
170 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, disguised with a plausible lure related to a 'dilapidation report'. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, suggesting a campaign to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.club/wix?keyword=dilapidation+report+nsw
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/4ae4db_d57e0e55bbde40cba4009c6128997d95.pdf
    • https://static.usrfiles.com/ugd/a4e402_b3319592deee4855a326ce345f640e42.pdf
    • https://static.usrfiles.com/ugd/eb5a6a_da56c12c43a6417db173cbb4af1895aa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4456/files/calculus_book_for_gate.pdf
    • https://cdn.shopify.com/s/files/1/0428/5654/6467/files/boxukuxubizezinaw.pdf
    • https://cdn.shopify.com/s/files/1/0438/4797/5062/files/mysql_cheat_sheet.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4ba4d94663945188c53ab2d047448fd.pdf
    • https://static.usrfiles.com/ugd/9219f8_8a9d03c89f914a82a56524e7f7ca2fd2.pdf
    • https://cdn.shopify.com/s/files/1/0430/1930/5113/files/raxurejelutala.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3622/files/24377503276.pdf
    • https://cdn.shopify.com/s/files/1/0429/3040/5535/files/73022088291.pdf
    • https://cdn.shopify.com/s/files/1/0459/2556/4583/files/47723350680.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0583/files/bulidusojumurulasesopolop.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ba3.bin
ee7b97ed98742c8ac534d459570ef83735ea798ce6451652b1d7f1fa32c13f84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA3 4832 bytes
font_01_sfnt_off00007c20.bin
8d25b210e6fb08e22d751162c713241dc7111ab7b63c1ee56e41c2519c7dd13f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C20 10272 bytes
font_02_sfnt_off00009f3c.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F3C 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.