Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd66e71e47da8c5…

MALICIOUS

PDF

139.8 KB Created: 2020-11-02 22:59:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 219892a7fc634f8fe06628d3ce63841c SHA-1: 114109b2d7eb6f41a904c26965344e89e6871b85 SHA-256: bcd66e71e47da8c5cada9db40808faf0d453163c59d57b67cde3434c808fca66
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, disguised as a search result for a popular game item. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of the malicious URL strongly indicate a phishing or scam attempt. Although no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to drive traffic to a malicious site, likely for further exploitation or credential harvesting.

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.me/123?keyword=borderlands+2+bone+of+the+ancients+gibbed
    • https://kebakiwaranug.weebly.com/uploads/1/3/4/3/134317860/purev.pdf
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5f871c6d65867.pdf
    • https://cdn-cms.f-static.net/uploads/4376125/normal_5f8b60cf2a27a.pdf
    • https://cdn-cms.f-static.net/uploads/4389104/normal_5f8ef6bf1a148.pdf
    • https://cdn-cms.f-static.net/uploads/4366362/normal_5f9b012257ff2.pdf
    • https://cdn-cms.f-static.net/uploads/4425501/normal_5f9ed8712acb8.pdf
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/sidejeko_daradilet.pdf
    • https://cdn-cms.f-static.net/uploads/4370542/normal_5f9bcf1388c2d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a000381e-08c7-46cb-8049-0d88ffa2d68d/12034046472.pdf
    • https://uploads.strikinglycdn.com/files/8de1e38b-33d4-458d-930d-3ac7b02ccf78/ginarujemijobesimi.pdf
    • https://uploads.strikinglycdn.com/files/bf0fe848-5cd8-4d89-b0e4-96140cb03148/15713283016.pdf
    • https://uploads.strikinglycdn.com/files/0b864c60-c242-419a-87ff-bc176454f33a/3073052150.pdf
    • https://s3.amazonaws.com/dazifozixawus/lelamigaves.pdf
    • https://uploads.strikinglycdn.com/files/24fd7465-0414-42ba-bbfb-de333edd5875/18089230626.pdf
    • https://s3.amazonaws.com/bulozor/singapore_airport_map.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e43d.bin
c7f9fe83bdbcdcd33579811084b0c1996d207f74f369e450d97661b768579c59
pdf-font-stream PDF embedded font (sfnt) at offset 0x1E43D 5604 bytes
font_01_sfnt_off0001f744.bin
f67a4bbc663b5c6a403173c421dc2172938cee21e8fcd73c831f12820c3271ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F744 13024 bytes