Malicious PDF — malware analysis report

Static analysis result for SHA-256 18c6cf023571ffcb…

MALICIOUS

PDF

40.6 KB Created: 2020-08-22 06:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 176a5665135649a4a0706be503425344 SHA-1: b74f4b11009b06c42122983df1300723210fc9f8 SHA-256: 18c6cf023571ffcb7f7567855841b7df04633df139f9551a694d9472ceea11a9
154 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 embedded URL 'https://ttraff.cc/pify?keyword=housekeeper+cv+template+uk' is designed to trick users into believing it leads to a job template, but it redirects to malicious infrastructure. The presence of numerous PDF links suggests an attempt to manipulate search engine results or distribute further malicious content.

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.cc/pify?keyword=housekeeper+cv+template+uk
    • http://tubezax.sisterlyloves.com/uploads/1/3/1/4/131437378/xopetavejunatugu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7661/6353/files/gawerepunet.pdf
    • https://cdn.shopify.com/s/files/1/0438/6367/0939/files/17065129172.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/curtain_wall_systems_a_primer.pdf
    • https://cdn.shopify.com/s/files/1/0435/5099/8679/files/adulthood_is_a_myth_a_sarah_s_scribbles_collection.pdf
    • https://cdn.shopify.com/s/files/1/0436/6453/9798/files/23982714809.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/26761954016.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rofan.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/best_english_learning_books.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3468/files/worizoxujuxadebi.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_off0000604b.bin
e2c587a18452205831bd3742f26410541e60abd10ffd836c7a88efdce5062392
pdf-font-stream PDF embedded font (sfnt) at offset 0x604B 5164 bytes
font_01_sfnt_off000071c9.bin
3ea6e4a8a0296f29451468e48776327a1efd1c7431cb020286d921e154008494
pdf-font-stream PDF embedded font (sfnt) at offset 0x71C9 10568 bytes