Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5218dc3caf3b48c…

MALICIOUS

PDF

45.8 KB Created: 2020-07-20 06:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 7647f45c2b286396b8227ac3536efc9c SHA-1: 1315a2e41c936355aefb1132744d21d5fcb7a272 SHA-256: e5218dc3caf3b48cbcd5daed08094f8f2f9f8e663b04fafd02966695112cfb3e
184 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a 'Prolectrix record player manual', suggesting a lure. The primary malicious URL identified is ttraff.cc, which is used to redirect users to further malicious content. The presence of a mass external PDF link farm further supports the malicious intent.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wb?keyword=prolectrix%20record%20player%20manual In PDF document text
    • http://files.ericaboothtaxes.com/uploads/1/3/1/8/131856746/vefabo.pdfIn PDF document text
    • http://files.columbiapsychmd.com/uploads/1/3/0/8/130813855/3880585.pdfIn PDF document text
    • http://files.suite-harmony.com/uploads/1/3/1/0/131070561/f092220ba.pdfIn PDF document text
    • http://files.fairytale-wedding.ca/uploads/1/3/1/4/131453401/tujipom.pdfIn PDF document text
    • http://files.zgoncmath.com/uploads/1/3/2/3/132303382/wobus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wewokonor.files.wordpress.com/2020/06/pifupidexugo.pdfIn PDF document text
    • https://mitugopagav.files.wordpress.com/2020/07/luralomi.pdfIn PDF document text
    • https://mamonuno.files.wordpress.com/2020/07/kovaxiwokakifuwabuju.pdfIn PDF document text
    • https://ginajovepe.files.wordpress.com/2020/07/25381897546.pdfIn PDF document text
    • https://tiduzadul.files.wordpress.com/2020/07/16038884625.pdfIn PDF document text
    • https://lozeman820821518.files.wordpress.com/2020/07/27394879750.pdfIn PDF document text
    • https://sivutis.files.wordpress.com/2020/06/30976374446.pdfIn PDF document text
    • https://pipetowizifu547741387.files.wordpress.com/2020/06/jifudikes.pdfIn PDF document text
    • https://viximoko.files.wordpress.com/2020/07/83337125613.pdfIn PDF document text
    • https://vorapizogu.files.wordpress.com/2020/06/xafirilurupapujamixige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/47660412108.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8280/9508/files/88078189837.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/70905038635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/waponegirana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/bekipare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7983/5547/files/vudijulekametovanez.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7265 5096 bytes
SHA-256: c546e934b31718d2139ba025235ca479f3f1c09f1e6025d7acfe7681b82752c4
font_01_sfnt_off0000839b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x839B 11520 bytes
SHA-256: eee7f7a8ac18b46bf488c1668aa02efd4684e8c4df4335112b13c2c8648a045b