Malicious PDF — malware analysis report

Static analysis result for SHA-256 80007af03ccca3a0…

MALICIOUS

PDF

40.1 KB Created: 2020-08-12 09:41:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32cd4dbae7a7002b00bb94739ff2f814 SHA-1: fa2e17c435d686f224b461009fc2cb91ffd6fde8 SHA-256: 80007af03ccca3a07c8172989c6822a43f2d927d1abd47950676cab8ae26afa6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to other PDF files, a technique often used for SEO poisoning or to distribute malicious content. One of the initial links redirects to `ttraff.ru`, a known malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated.

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=biblia+de+estudio+reina+valera+pdf
    • http://files.myvegandish.com/uploads/1/3/1/4/131454272/fezetitapunuxugi.pdf
    • http://files.hgigreenhousefarms.com/uploads/1/3/2/3/132303359/f74caeda70a7f.pdf
    • http://files.fairhavenhome.com/uploads/1/3/2/6/132682851/virozu.pdf
    • http://files.27westmovie.com/uploads/1/3/1/4/131437229/niviv-dukanakof-fugolose.pdf
    • http://files.marzenaugorna.pl/uploads/1/3/1/6/131636946/mekupapogisitaga.pdf
    • https://cdn.shopify.com/s/files/1/0437/0199/3622/files/reading_comprehension_worksheets_high_school.pdf
    • https://cdn.shopify.com/s/files/1/0434/0419/8038/files/rexolesov.pdf
    • https://cdn.shopify.com/s/files/1/0434/0734/3772/files/misoderajutefele.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/lavojabegux.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/51829719086.pdf
    • https://cdn.shopify.com/s/files/1/0433/0602/5128/files/87263711575.pdf
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/lisipawoxutugud.pdf
    • https://cdn.shopify.com/s/files/1/0435/4329/8207/files/busch_stadium_soccer_seating_chart.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/29396540135.pdf
    • https://cdn.shopify.com/s/files/1/0429/5367/0822/files/amidah_en_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/negopolikutowuz.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000567a.bin
72e459e26e6945b932ec788f8fd12270eaf060f4524fdc26d4f97c66fb5f76df
pdf-font-stream PDF embedded font (sfnt) at offset 0x567A 5284 bytes
font_01_sfnt_off00006879.bin
141ef2e741cbc934ece8380476fa94a7115a06d57a5c3683eef1607bf2ad846e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6879 13388 bytes