Malicious PDF — malware analysis report

Static analysis result for SHA-256 2260b16c40267b6e…

MALICIOUS

PDF

45.6 KB Created: 2020-07-10 05:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: b08b69993143d2d2070480cf98119416 SHA-1: 27958a55220e4f6c751ed28dfc64e15bf3d8ec1c SHA-256: 2260b16c40267b6e764d2ed1d01f5b8ade1c004d8ad66ed9df8b6ba85c9cb461
184 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, with a critical heuristic firing for a malicious redirector link. The ML classifier also strongly indicated maliciousness. The document body itself is heavily obfuscated but contains references to the URLs, suggesting a lure to external malicious content. No scripts were extracted from this sample.

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.ru/wb?keyword=haloalkanes%20ncert%20solutions%20pdf In PDF document text
    • http://files.jeremysony.com/uploads/1/3/2/7/132710704/ruruduvagirodoji.pdfIn PDF document text
    • http://files.glenheart.co.uk/uploads/1/3/1/4/131406068/xenipiluwi.pdfIn PDF document text
    • http://files.elmermeijers.com/uploads/1/3/1/3/131379781/dubizurusujatimevawa.pdfIn PDF document text
    • http://files.dearborn411.com/uploads/1/3/2/7/132740860/xokagilo.pdfIn PDF document text
    • http://files.chilcotinoutfitters.com/uploads/1/3/2/7/132741764/mexeku.pdfIn PDF document text
    • http://files.longevitywines.com/uploads/1/3/1/3/131379115/sagixomod-rifanim-merofolazus.pdfIn PDF document text
    • http://files.lauralrees.com/uploads/1/3/2/8/132815753/474294.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://labajejumiwi.files.wordpress.com/2020/07/bomomupelujo.pdfIn PDF document text
    • https://tazesetinud.files.wordpress.com/2020/06/poduzuvegufogod.pdfIn PDF document text
    • https://zufiwupaned.files.wordpress.com/2020/06/83055753250.pdfIn PDF document text
    • https://vonemimul.files.wordpress.com/2020/06/lovuwewop.pdfIn PDF document text
    • https://lorabipuv.files.wordpress.com/2020/06/geripebugaxegitodupeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13139855908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/saran.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/serananovuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71860998709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nemevisofopanufu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000755d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x755D 5056 bytes
SHA-256: 9fcf0362238ea740507d965f73bdb91effead57d177547552fc683f5242fb861
font_01_sfnt_off00008693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8693 10168 bytes
SHA-256: a533daf0fa59548fad0cd18306e4af4cc649dfa05985ce3c7718e99db4e682fc

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