Malicious PDF — malware analysis report

Static analysis result for SHA-256 e668b75ef008b4c9…

MALICIOUS

PDF

45.6 KB Created: 2020-08-19 13:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9b0063d562ec0518039601f73863d58 SHA-1: ff84131e80aa2138972e8d1c424dcd94657c0356 SHA-256: e668b75ef008b4c9cd7f42950867a4fd5ffcede68d410907bef881cd43623abd
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains numerous embedded links. One of these links, 'https://ttraff.ru/pify?keyword=antariksha+pisachi+cinema', points to known malicious redirector infrastructure. The document also exhibits characteristics of a PDF link farm, with many URLs pointing to Shopify-hosted PDF files, suggesting an attempt to manipulate search engine results or distribute content through a seemingly benign platform.

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=antariksha+pisachi+cinema
    • http://rosiwiwa.northernsoulcostablanca.com/uploads/1/3/1/8/131856177/f7270069a78.pdf
    • https://cdn.shopify.com/s/files/1/0431/3363/2678/files/85149603942.pdf
    • https://cdn.shopify.com/s/files/1/0433/8581/5205/files/slope_intercept_form_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/9374/5046/files/tonitoretama.pdf
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/4061787297.pdf
    • https://cdn.shopify.com/s/files/1/0437/8309/4434/files/xadoloxiderivugidiwide.pdf
    • https://cdn.shopify.com/s/files/1/0438/0642/5248/files/87518093749.pdf
    • https://cdn.shopify.com/s/files/1/0434/3886/6593/files/27969391862.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66541571973.pdf
    • https://cdn.shopify.com/s/files/1/0431/3281/3469/files/16443330804.pdf
    • https://cdn.shopify.com/s/files/1/0435/1049/7434/files/fuxiviwex.pdf
    • https://cdn.shopify.com/s/files/1/0430/9024/7829/files/16536590215.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nitopufekuriwuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/1204/6491/files/dewolomoxuvewubexolijexa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005df5.bin
9c458018b53908c81b37b09c912485c3b1055af0eb809dab38bf6ff23f8e5704
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF5 5196 bytes
font_01_sfnt_off00006f68.bin
96e06bac708f0ff8dc108d325c9befa2a92aded90f24b9adaf032f6286ace2d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F68 11112 bytes
font_02_sfnt_off00009464.bin
fb04de3ebd5cebbb6df04606e29c0eb10d03b5e47dcf214ea18d19a621ffd189
pdf-font-stream PDF embedded font (sfnt) at offset 0x9464 16140 bytes