Malicious PDF — malware analysis report

Static analysis result for SHA-256 30cc72cd3c2d2e1a…

MALICIOUS

PDF

42.1 KB Created: 2020-11-01 06:37:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7ca7bcd08abb21e068a45f46918a1398 SHA-1: 88557388dc0a4220ff659a2e8d219c955edcb37a SHA-256: 30cc72cd3c2d2e1a867202078486733b88ef0e340d1d92d4de8a0ef02cc7f8c5
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on disposable domains, indicating a link farm designed to redirect users. One URL, 'https://gettraff.ru/aws?keyword=job+description+student+worksheet', is explicitly flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to job descriptions and URLs, reinforcing the lure.

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://gettraff.ru/aws?keyword=job+description+student+worksheet In PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/1257316.pdfIn PDF document text
    • https://fiselowozol.weebly.com/uploads/1/3/4/3/134366189/49b4dd01.pdfIn PDF document text
    • https://nisutezobeta.weebly.com/uploads/1/3/4/4/134486685/pajokaxorisojavelu.pdfIn PDF document text
    • https://fidurelofomus.weebly.com/uploads/1/3/0/7/130740547/499f0accee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_5f89d135c8f93.pdfIn PDF document text
    • https://jarofudi.weebly.com/uploads/1/3/1/4/131408364/438692.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/lizefukiresobida.pdfIn PDF document text
    • https://bizitodavil.weebly.com/uploads/1/3/4/3/134321392/2488225.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kavitokolezub/intelligent_business_english_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c83a9ed2-ecbd-4d45-8136-77a7ae502314/akai_drum_machine_xr20.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/swtor_smuggler_scoundrel_or_gunslinger_reddit.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B71 5088 bytes
SHA-256: f6cb1ee8226bf1206acc33082ff0f40549db2721f03c4e83d798ac38e4329bc0
font_01_sfnt_off00006cbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBD 9760 bytes
SHA-256: 73f195134012d6ae8fd1aac057f21a671c92928a3c0489a93307f1f60dfa3859
font_02_sfnt_off00008dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD9 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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