Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c83f54ddd412354…

MALICIOUS

PDF

40.0 KB Created: 2020-08-31 00:26:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 147214c9a5cc6dd7f049977a3789415d SHA-1: e677eb5c69cbb1d8dab5660ac2aae82acf456967 SHA-256: 1c83f54ddd412354d8cfad8f381bc0650d989a270c1522c6b737f2560a33b435
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a link farm strategy, likely to manipulate search engine results or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. The document body is heavily obfuscated but contains the malicious URL and other PDF 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.com/wix?keyword=fred+davis+nonduality
    • https://static.usrfiles.com/ugd/362633_b9864266e40c4960a13ee903c8848110.pdf
    • https://static.usrfiles.com/ugd/b8c837_69260b6ea10e4c69897655aa39b009b2.pdf
    • https://static.usrfiles.com/ugd/455f95_1a00ff173aa84af681a0c9012ff24082.pdf
    • https://cdn.shopify.com/s/files/1/0463/0282/2557/files/dotikefejebakipekuzeget.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab7dfa9ee2a349b39ab2e67218c33852.pdf
    • https://static.usrfiles.com/ugd/b8c837_c468c2040188450289c3949a2aa6740d.pdf
    • https://static.usrfiles.com/ugd/e1c37d_bbbda22857164cfea4d8ec070f40ebee.pdf
    • https://cdn.shopify.com/s/files/1/0434/9113/1554/files/enlaces_ionicos_covalentes.pdf
    • https://cdn.shopify.com/s/files/1/0435/0106/0262/files/biology_text_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/tinkers_construct_material_traits.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_off00005eaa.bin
ddb5c5376bc264d9b1b6fac77a4382a5638443c2f4a1b21a0882a1b0fdb1cd05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAA 4936 bytes
font_01_sfnt_off00006f8f.bin
eefe69a7dd7dc2c4c7bf426f27c439955aa105025e67d5e02381a6ebb9f218ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8F 10572 bytes

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