Malicious PDF — malware analysis report

Static analysis result for SHA-256 6040996da87e9043…

MALICIOUS

PDF

46.0 KB Created: 2020-08-11 15:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00a3cbc1266c7ecba9a05ff8ba0449f0 SHA-1: 13191dc0e59e3fe3626f9fd36d2f6037b52376c5 SHA-256: 6040996da87e9043851468be100e2951c64665950c521a6e87555588466b04c4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document also hosts a large number of links to other PDFs, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness, supporting the presence of malicious links.

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.com/pify?keyword=beatriz+preciado+manifiesto+pdf
    • http://files.veryreadable.com/uploads/1/3/0/8/130873995/pumodutasuweni_kegupegawumaso_foxiba.pdf
    • http://files.stephaniemarceau.com/uploads/1/3/1/4/131452902/suzapug-figupolal-tesojo-gedeverof.pdf
    • http://files.yourperfectflooring.com/uploads/1/3/0/7/130775970/buzudevariza.pdf
    • http://mewus.southporttaxi.co.uk/uploads/1/3/2/8/132814930/858b3cd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/2073490079.pdf
    • https://cdn.shopify.com/s/files/1/0428/4986/1791/files/40660144989.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5377/files/gta_vc_zombie_mod.pdf
    • https://cdn.shopify.com/s/files/1/0431/7904/9121/files/55394021668.pdf
    • https://cdn.shopify.com/s/files/1/0432/2459/6642/files/31924432959.pdf
    • https://cdn.shopify.com/s/files/1/0438/3621/1362/files/7090959730.pdf
    • https://cdn.shopify.com/s/files/1/0430/4506/0762/files/subaru_ej25_engine_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/29833822507.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6690/files/puvezemuvelisirejoxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/nevuparis.pdf
    • https://cdn.shopify.com/s/files/1/0434/3450/8454/files/budget_preparation_format.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/negabozetemodep.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5175/files/64226612484.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_off0000727f.bin
2abc15489a23084fe95f5a451d937cc944330103db6f5f6e68b21605c72f5368		 pdf-font-stream PDF embedded font (sfnt) at offset 0x727F 5368 bytes
font_01_sfnt_off000084af.bin
e7f9ffeab2f0e3233e715d83a22ea075c17d4d21fef96a393726efd67fb6215f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84AF 11324 bytes

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