Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ac1b3ad1aa7c567…

MALICIOUS

PDF

44.1 KB Created: 2020-09-10 14:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6bc739a219f488bd376f32424fbbb24 SHA-1: 790283a248a266d739de39da2e7c6ff0287c62db SHA-256: 5ac1b3ad1aa7c56790fc50668a2b9f7bbe477dc7f6a5cd0feba17fe479069d88
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a football game and the malicious URL. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, suggesting a link farm or SEO manipulation tactic. No scripts were extracted, but the presence of a malicious redirector URL is a strong indicator of malicious intent.

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.club/wix?keyword=full+information+about+football+game
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/9748/7512/files/70359337162.pdf
    • https://cdn.shopify.com/s/files/1/0440/7053/5318/files/jessica_reddy_nude.pdf
    • https://cdn.shopify.com/s/files/1/0433/5792/9621/files/kiwujomubowerima.pdf
    • https://cdn.shopify.com/s/files/1/0433/9495/7475/files/mesny_calderas_de_vapor.pdf
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/lisipawoxutugud.pdf
    • https://cdn.shopify.com/s/files/1/0438/3745/6534/files/biochemical_food_tests.pdf
    • https://cdn.shopify.com/s/files/1/0433/4161/1159/files/antigona_velez_resumen.pdf
    • https://cdn.shopify.com/s/files/1/0433/5697/9351/files/28259365515.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7394/files/jaxodanegedokiwemonus.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/13921485655.pdf
    • https://static.usrfiles.com/ugd/a4c1fa_d5602410d9e547b588b7d380126e330e.pdf
    • https://static.usrfiles.com/ugd/dba42a_ed5968d69beb4faebc8c484a113f3b62.pdf
    • https://static.usrfiles.com/ugd/39cb9d_17be950f411b4b37abdcb68786e5b651.pdf
    • https://static.usrfiles.com/ugd/b8c837_01bd7025355e4564b718e80627547cb6.pdf
    • https://static.usrfiles.com/ugd/af0aa9_c4e3d895dca94296868bb6cee23ab2b9.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_off0000627d.bin
e44f89110a15d29c7badb6be29cab68fdecffa38113e036f5a0334301942559d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x627D 4888 bytes
font_01_sfnt_off000072ff.bin
3e742eb7415f2979d35d0199d5722a45710586acbe912547977ca92814e68268		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72FF 10004 bytes
font_02_sfnt_off00009531.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9531 4324 bytes

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