Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0dc2c8438176b7…

MALICIOUS

PDF

42.8 KB Created: 2020-08-20 19:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41fee87f1c9f510ad435e1b9632c0c02 SHA-1: f798aaa2ae48de7dd212e6ebfee064a7ec4dd8e7 SHA-256: 7e0dc2c8438176b743113cbee070fa3e012e9d9bd5e6d23828000ba95a562388
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links to other PDF documents, a technique often used for SEO poisoning or to obscure malicious links. One of these links, 'https://ttraff.cc/pify?keyword=based+zeus+godly+texting+guide+free', is identified as a malicious redirector. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document is intended to trick users into downloading a password-protected archive, likely to bypass security scanning. The ML classifier also strongly indicated maliciousness.

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.
  • 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
  • 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/pify?keyword=based+zeus+godly+texting+guide+free
    • http://luluzetap.fronhoferlab.net/uploads/1/3/1/6/131636719/vomevo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/dream_allegory.pdf
    • https://cdn.shopify.com/s/files/1/0432/8102/3140/files/virtual_circuit_switching.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/assisted_ventilation_of_the_neonate_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/4392/9762/files/59009971934.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/bixopivuroxol.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3162/files/34811119748.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5400/files/quizas_quizas_quizas_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0438/9853/6091/files/36682891770.pdf
    • https://cdn.shopify.com/s/files/1/0429/6327/1833/files/heart_failure_preserved_ejection_fraction_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/movies_anywhere_android_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/1116/2790/files/38230500213.pdf
    • https://cdn.shopify.com/s/files/1/0434/9231/1206/files/tafsir_alquran_bahasa_melayu_pdf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a49.bin
e3239d81455990d06f66f11dc426bc37a268f25b1218c2d7db7a0d0872af141a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A49 5224 bytes
font_01_sfnt_off00006c2e.bin
ca486235ef207da38c39474898b9ec27302a9a9232b65a20882dfa25a6704b2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2E 10696 bytes
font_02_sfnt_off000090a1.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90A1 4324 bytes

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