Malicious PDF — malware analysis report

Static analysis result for SHA-256 97bfd21a49266eb7…

MALICIOUS

PDF

39.8 KB Created: 2020-08-29 13:39:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0a4dbc1ea95f004cbae3a3a396750f9 SHA-1: cc810661f9efd1b6add90b1535bcb9441a1984e2 SHA-256: 97bfd21a49266eb7a26f807cf889760a9a79633ed7ee6fb4aa92dc0a3d0930f3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=geography+bee+study+guide+pdf'. The document body, though heavily obfuscated, contains references to 'geography bee study guide pdf' and the malicious URL, suggesting a lure. The presence of numerous other PDF links, identified as a link farm, further supports the malicious intent of redirecting users to potentially 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/wix?keyword=geography+bee+study+guide+pdf
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/namebetiduvisu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7152/0414/files/terrible_things_allegory.pdf
    • https://cdn.shopify.com/s/files/1/0435/3212/4312/files/24773475796.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/radeziwiwilajumigetadad.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9f5f7f5379e4876ad58c30ace4d4944.pdf
    • https://static.usrfiles.com/ugd/b8c837_0003321d600c4ca7967a273a0d5821d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6210fa0add848b795733c8bad17d172.pdf
    • https://static.usrfiles.com/ugd/b8c837_38d614b8dec34dcc881415fb9c583ce8.pdf
    • https://static.usrfiles.com/ugd/b8c837_33dff6db67a745c8a444d4e71dc23f28.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/checkers_application.pdf
    • https://cdn.shopify.com/s/files/1/0438/0891/5613/files/examen_ceneval_derecho_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/93043952558.pdf
    • https://cdn.shopify.com/s/files/1/0429/4773/9811/files/pekanitexupisowodaxijozel.pdf
    • https://static.usrfiles.com/ugd/b8c837_6da0f68d283449aeb1160ebcaa472dc1.pdf
    • https://static.usrfiles.com/ugd/accd1f_fd91ca087d2f46d184b7161f843055a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5da69e4631440b58f7fcf8c8e94b7ee.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ff3186acd834b2e8529789e18225bd5.pdf
    • https://static.usrfiles.com/ugd/b8c837_969d7d6b1acf4c748d9fed53a9ac2355.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_off00005c4c.bin
441e308275232266d52e22e25df3ad88b1a197faf62f420724c0b4ae7fb67c28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4C 5544 bytes
font_01_sfnt_off00006f27.bin
1becad7881655da3d2c3ffb671f9efdad90409c49de77a33e6fc06a27bef0e57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F27 10308 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.