Malicious PDF — malware analysis report

Static analysis result for SHA-256 1180384c9df69698…

MALICIOUS

PDF

45.1 KB Created: 2020-09-06 01:25:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01a421761837f11f6b80cfd8bb1ae589 SHA-1: 0962e0fbe39876a1a0cdabdb97276745c66301eb SHA-256: 1180384c9df6969865d127b2ef5d0a767ed6ad2d433ec3118e3d84bd144b53bb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, a technique often used for SEO link farming or to obscure malicious redirects. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that leads to this malicious redirector.

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=livre+pour+apprendre+le+russe+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/rotigosonokumonugeri.pdf
    • https://cdn.shopify.com/s/files/1/0437/9456/3221/files/fanoka.pdf
    • https://cdn.shopify.com/s/files/1/0433/8538/9221/files/going_to_and_present_continuous_exer.pdf
    • https://static.usrfiles.com/ugd/93971e_da2d8a909eee4d3d84ef280f8eb5ebfa.pdf
    • https://cdn.shopify.com/s/files/1/0446/0707/8564/files/headway_elementary_video_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tinoled.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/56473922124.pdf
    • https://cdn.shopify.com/s/files/1/0433/5671/7206/files/nithya_vishudhayam_kanya_mariyame.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/46451721025.pdf
    • https://cdn.shopify.com/s/files/1/0433/4298/7423/files/differentiability_questions_and_answers.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_off00006e4b.bin
36e23f9d76b199217ae9726da745ef576b26500716d359225cbc0ec8a5cf3a18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4B 5036 bytes
font_01_sfnt_off00007f88.bin
132d96bc45ccf6d0d48322c4602e116acc92d5d93dfb38ef3fe8f5afde833892		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F88 12620 bytes

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