Malicious PDF — malware analysis report

Static analysis result for SHA-256 04db4d510e163849…

MALICIOUS

PDF

44.0 KB Created: 2020-09-12 13:40:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0071975f8db4810e44cc7be205d256f4 SHA-1: cab6039ca9856c65f0bdd4d8807d2dd540b468a8 SHA-256: 04db4d510e1638496ff9ccc46963d3cbf69aa1041810e0e0b3bc875d621440b0
154 Risk Score

Malware Insights

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

The PDF contains a high number of external links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to manipulate search engine results. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be luring the user to a malicious site via embedded links.

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/wb?keyword=adverbs%20of%20frequency%20present%20simple%20worksheet%20pdf
    • http://files.barbaraschupack.com/uploads/1/3/1/4/131407047/3756922.pdf
    • http://files.genesiseventsinc.com/uploads/1/3/0/7/130776158/lowibunagiwis_vejekalinosa_rejitopufup_desudizesivuv.pdf
    • http://files.biglifecc.org/uploads/1/3/0/9/130969957/lujatir.pdf
    • http://gupomesa.edwardsfinds.com/uploads/1/3/1/3/131384635/ceb602.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/6f9b04_311f0cd1619e4acd8aa39fd367731acf.pdf
    • https://static.usrfiles.com/ugd/1b7c00_dd5aab7d072446acbd34e994e0f51e02.pdf
    • https://static.usrfiles.com/ugd/bd1fc0_1172ad639e1f4c9fbdd1da1110019f32.pdf
    • https://static.usrfiles.com/ugd/07ef24_769e8c5f4753485f9ed8867b7bf6f8e7.pdf
    • https://cdn.shopify.com/s/files/1/0431/0745/1042/files/25860811276.pdf
    • https://cdn.shopify.com/s/files/1/0435/2848/7072/files/nadimetawipugafo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/beck_youth_inventory.pdf
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/rupobekukerewuropipefefu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1055/4016/files/sheet_pan_curried_chicken_and_cauliflower.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f25.bin
936db5907e18a7b4d334aa7118c0f55166cb9267bd971a5ef0c466b0a29b5fb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F25 5640 bytes
font_01_sfnt_off00007238.bin
8a5ab4fa24c29a456c787dc392c0b62b0ce0064317545265735cc670bfd40bae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7238 10208 bytes
font_02_sfnt_off000094f4.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94F4 4324 bytes

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