Malicious PDF — malware analysis report

Static analysis result for SHA-256 115ced6883b876a0…

MALICIOUS

PDF

41.7 KB Created: 2020-08-04 09:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1efcae16db0b2b4a6ed9b70d9506aa8 SHA-1: 673d5006b847d17a4d480b0d995545b5c425a47e SHA-256: 115ced6883b876a0b6d6d33799560a1f4d9253d953e50fb0ae2831b3cfe5c22a
154 Risk Score

Malware Insights

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

The PDF contains embedded links and text that mimic an 'Avon catalogue july 2020 pdf' to entice users. One of the primary links, 'https://ttraff.ru/pify?keyword=avon+catalogue+july+2020+pdf', is flagged as a malicious redirector. The document also hosts a large number of other PDF links, suggesting a link farm or SEO poisoning attempt, with the primary malicious link being the most prominent. No scripts were extracted, but the PDF structure and embedded links strongly indicate a malicious intent to redirect users to harmful 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.ru/pify?keyword=avon+catalogue+july+2020+pdf
    • http://files.tcsocalbaseball.com/uploads/1/3/1/4/131453267/kavubejivefe_lanirukadawadu_xojofumupegorez.pdf
    • http://files.eurabrownpe.com/uploads/1/3/1/3/131382387/9a7f808c.pdf
    • http://files.auenpaint.com/uploads/1/3/1/3/131398479/1015468.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/8710950213.pdf
    • https://cdn.shopify.com/s/files/1/0429/2476/9436/files/putawu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1673/3340/files/55324874392.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/80521309621.pdf
    • https://cdn.shopify.com/s/files/1/0433/9544/8997/files/wugemavuzatokapemabuzo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kovogosiwe.pdf
    • https://cdn.shopify.com/s/files/1/0446/1743/3251/files/canticle_for_leibowitz.pdf
    • https://cdn.shopify.com/s/files/1/0445/4537/6420/files/annotated_outline_example.pdf
    • https://cdn.shopify.com/s/files/1/0437/7231/3751/files/3494060555.pdf
    • https://cdn.shopify.com/s/files/1/0431/8478/3509/files/jureduzebalewuxelixizu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0926/9156/files/drastic_ds_emulator_apk_license_crack.pdf
    • https://cdn.shopify.com/s/files/1/0428/7463/4403/files/14819801912.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_off00006462.bin
1c94828706a394723340aa81b061c4bc99cef2271b96614b89692cfa08226a25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6462 5552 bytes
font_01_sfnt_off00007780.bin
6bdc6cccdf3fe8ca570e905efe8ce98705ebd8cf967caf96b103ce0950857eb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7780 10204 bytes

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