Malicious PDF — malware analysis report

Static analysis result for SHA-256 8001e61ecf12fb94…

MALICIOUS

PDF

49.8 KB Created: 2020-09-16 22:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4e7cd20c1d4e82fa4856f32e8503ae5 SHA-1: 4b9303017bb9f45d20d1ed5fd59eaae061c4833f SHA-256: 8001e61ecf12fb94152630754760a6657131d1ad84e99c9ca8791d34e81beed2
224 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a movie download. This suggests the PDF is designed to trick users into visiting malicious sites, likely to download malware or engage in phishing. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.club/wix?keyword=logan+full+movie+in+english
    • http://tivajota.velvetandjutesoaps.com/uploads/1/3/1/4/131452839/d8e26.pdf
    • http://files.graham-g4jzf-70007.com/uploads/1/3/1/8/131872238/najatidolajewani.pdf
    • http://dabevo.hscte.net/uploads/1/3/1/4/131482995/kemokesamexejujaxo.pdf
    • http://files.greywolfhowling.com/uploads/1/3/1/6/131606366/4670962.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://25da1cd9-757e-43ee-9329-40fe05072c31.filesusr.com/ugd/33ab24_cfd4aa60e50b4f3d9ebfbf6db5726e6a.pdf?index=true
    • https://aad2b639-d4c2-4af8-82e8-d5319f7acc6e.filesusr.com/ugd/0cd019_bc8fb246183c42eca323703a77d37e9e.pdf?index=true
    • https://40ef9128-8135-4828-a758-adc100148f19.filesusr.com/ugd/eb6612_0ee3d1e63630425aa3830803bef01ea1.pdf?index=true
    • https://a0f160ac-4c89-43c9-a27c-6b3d8ea624d7.filesusr.com/ugd/c4dbd3_b5b9aceb1c6e46b78144aaedb9c485c0.pdf?index=true
    • https://e29ded64-38f5-4eed-a212-40e172c18d8d.filesusr.com/ugd/b148e5_4e6d895f2924432d8834055be864143f.pdf?index=true
    • https://dad486d6-5f4d-4b97-8d88-988bcc5b1294.filesusr.com/ugd/66f3f9_139d9577f74e4c0cbdc9ca7aee3a23f1.pdf?index=true
    • https://31aa4a2a-46c3-4c8a-9336-0c236ae27b6e.filesusr.com/ugd/eb4c03_376a283a53ae4cdba68a831465812080.pdf?index=true
    • https://e5c0365f-f739-4100-a59d-bb9758c6f15a.filesusr.com/ugd/3e87bf_82530602a46e4f7d88f343fd5591af58.pdf?index=true
    • https://9d9e6354-dca2-4a14-9578-93ff7594b131.filesusr.com/ugd/3bcfef_1df010f04aa24eabbde969231ca48f9e.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8007882555.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/zafozevexo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/hit_die_dnd_5e.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_off000077b2.bin
69d467f7e78a5b8b41244f17cee7a7be947df3b73693644a6e5f3dc4dcdc9fa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B2 5088 bytes
font_01_sfnt_off000088f3.bin
48b8ea407e33d97dde58d6b79663145a150ddcc691995c7b785f1ef29a8e19e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88F3 15964 bytes

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