Malicious PDF — malware analysis report

Static analysis result for SHA-256 067778f916e5c952…

MALICIOUS

PDF

40.2 KB Created: 2020-09-21 04:43:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96708720e0f6d73704f175955d4d6076 SHA-1: ff1e69339f584979cd94899d9ed103d0f8fddb35 SHA-256: 067778f916e5c9528367b9ad0ff2a91be091f759902de09dbaea0ef7899ea48f
154 Risk Score

Malware Insights

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

This PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious link, 'https://ttraff.me/wix?keyword=uc+mini+browser+apk+old', is designed to lure users into downloading potentially malicious software. The document body, though heavily obfuscated, contains this URL and other links, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites.

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/wix?keyword=uc+mini+browser+apk+old
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/6060/9692/files/79766778021.pdf
    • https://cdn.shopify.com/s/files/1/0428/6378/8188/files/english_grammar_in_odia.pdf
    • https://cdn.shopify.com/s/files/1/0429/4557/7116/files/diberefapofe.pdf
    • https://cdn.shopify.com/s/files/1/0437/3279/5541/files/45614608694.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/32776822742.pdf
    • https://cdn.shopify.com/s/files/1/0431/6633/5142/files/32579803329.pdf
    • https://cdn.shopify.com/s/files/1/0430/6475/4325/files/4487305220.pdf
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/basic_electronics_in_hindi_downl.pdf
    • https://cdn.shopify.com/s/files/1/0436/8397/1237/files/pukabidinu.pdf
    • https://cdn.shopify.com/s/files/1/0484/9041/4241/files/011_country_code.pdf
    • https://cdn.shopify.com/s/files/1/0463/5217/1174/files/12144355008.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/texigusowemojegovivek.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2635/files/biosystem_cheque_writer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/4939/2030/files/34225786429.pdf
    • https://cdn.shopify.com/s/files/1/0433/7975/3121/files/the_works_engineering_design_process_worksheet.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_off00006004.bin
240f36a6375389bcbe857f7d48e2a5949a8055cfd03e2066eb9000b06845db2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6004 5504 bytes
font_01_sfnt_off000072b2.bin
788e2babbae222ffbc05873f33e6289eb6ca8c729d4c79131a5b48f909fce5bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x72B2 9816 bytes