Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b27541eb8580fa2…

MALICIOUS

PDF

43.5 KB Created: 2020-06-03 15:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75a4842ace64c7c3a2104755ab49a747 SHA-1: e878d5927ca21934800eed8374f03154303b2ffc SHA-256: 6b27541eb8580fa2f230f3623c1bc9bdee16c680af3427d84d9e19420b672b5e
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a strong likelihood of malicious intent, likely to redirect users to phishing or malware hosting sites. Although no scripts were explicitly extracted, the nature of the embedded links and the ML classification suggest a malicious document designed to exploit user trust.

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.com/wp3?keyword=hulbert+financial+digest+guide#hulbert+financial+digest+guide
    • http://chiartelasa.com/uploads/1/3/1/4/131408142/3249341.pdf
    • http://poochesandme.com/uploads/1/3/1/6/131607404/tekoratofazotup.pdf
    • http://tranquilitybasellc.com/uploads/1/3/0/6/130605040/givovigepa_zujegum_xunepavuf_bijidonu.pdf
    • http://toterraproductions.com/uploads/1/3/0/3/130324320/gapidofopi.pdf
    • http://fhmic.org/uploads/1/3/0/2/130270951/palodujepes.pdf
    • http://geneticcounsellingconsultancy.net/uploads/1/3/0/8/130874666/gegopemivuk-wexuxo-gotivo.pdf
    • http://shortseason.co.uk/uploads/1/3/0/2/130288383/1068d89436.pdf
    • http://samioahpahus.com/uploads/1/3/0/2/130272921/niduruxerezop_pukavutogojaba_samuvu.pdf
    • http://eilishfoleyva.com/uploads/1/3/0/3/130323616/7235329.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://porugisi.files.wordpress.com/2020/05/86877369544.pdf
    • https://likulorasix.files.wordpress.com/2020/05/65484811591.pdf
    • https://kilotoxite.files.wordpress.com/2020/06/15954531567.pdf
    • https://wordpress.com/tos/
    • https://wordpress.com/dmca.html
    • https://wordpress.com/policy.html
    • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079fd.bin
2ea02d25d5187a27453e2c26b967175bad5bfb4f36422abd330900e2e92bb998
pdf-font-stream PDF embedded font (sfnt) at offset 0x79FD 11352 bytes