Malicious PDF — malware analysis report

Static analysis result for SHA-256 361d5029702ac2fd…

MALICIOUS

PDF

40.0 KB Created: 2020-08-29 22:20:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 298bce264ffcc5d48add9d512a6dddbe SHA-1: 82de2d81cd2fc61ed1b7ffb6d898f707e908f354 SHA-256: 361d5029702ac2fd56abc9c477927d5ee3fcac7cff910e70f5f608ae06da47dc
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to a URL designed to lure users into downloading further malware. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to a movie download. The ML classifier strongly indicated maliciousness, and the PDF structure includes a link farm, suggesting an attempt to distribute malicious 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/wix?keyword=blue+is+the+warmest+colour+movie+dow
    • https://cdn.shopify.com/s/files/1/0431/6302/5567/files/gigozuvabubiga.pdf
    • https://cdn.shopify.com/s/files/1/0428/6133/0591/files/xobifiwufin.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/kogaza.pdf
    • https://cdn.shopify.com/s/files/1/0438/8359/3880/files/abzurdah_cielo_latini.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/soziderufemelibawulo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/bihar_police_si_question_paper_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/0235/6127/files/learn_english_urdu_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/5024/5028/files/greedfall_reputation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/hd_banner_background_image.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/70880092297.pdf
    • https://cdn.shopify.com/s/files/1/0431/4418/3970/files/52656262314.pdf
    • https://cdn.shopify.com/s/files/1/0432/2046/7869/files/goziri.pdf
    • https://static.usrfiles.com/ugd/badafb_7aa4a5924ad944ccbf8f6c2c0f5e6404.pdf
    • https://static.usrfiles.com/ugd/7baf93_886a8a6c9def472180d87f01da1020b9.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_off00004fcc.bin
8293c43f9eb89c8c3a9a24f3b47aaf246588382925383a3bb113c2f445cc1fcb
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FCC 5380 bytes
font_01_sfnt_off00006204.bin
2f5915bff260f95262265eac6dbc45cf188fa3d9cfd51dcfe1a62edb085ac5dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6204 15644 bytes