Malicious PDF — malware analysis report

Static analysis result for SHA-256 7530c5057a4c0c05…

MALICIOUS

PDF

40.3 KB Created: 2020-10-04 19:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0641d0df227bbd5fb350b441fdf67574 SHA-1: 91aaa37c9af6aba4b63a79fb185271c5bca24b96 SHA-256: 7530c5057a4c0c058e5680b0415548d322bac0651530de80ff92227f5ab981b7
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically 'ttraff.club'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the malicious URL, suggesting it is the primary lure. No scripts were extracted from this sample.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/pify?keyword=outlaw+paintball+gun In PDF document text
    • https://site-1041501.mozfiles.com/files/1041501/81960295716.pdfIn PDF document text
    • https://site-1038852.mozfiles.com/files/1038852/golitoluletiwid.pdfIn PDF document text
    • https://site-1043455.mozfiles.com/files/1043455/vejekewipubobo.pdfIn PDF document text
    • https://site-1039135.mozfiles.com/files/1039135/65755220258.pdfIn PDF document text
    • https://site-1036679.mozfiles.com/files/1036679/94345869630.pdfIn PDF document text
    • https://site-1037207.mozfiles.com/files/1037207/tamegonezebujewigipi.pdfIn PDF document text
    • https://site-1039472.mozfiles.com/files/1039472/85942279.pdfIn PDF document text
    • https://site-1040350.mozfiles.com/files/1040350/gegusorakev.pdfIn PDF document text
    • https://site-1036649.mozfiles.com/files/1036649/fumuwobijimowizonaguw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3732/5472/files/tixenakuvozolopapubitara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0070/8765/files/baby_r_us_breast_pump_rentals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2177/0657/files/81031277341.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E43 4972 bytes
SHA-256: 986a943a15828dd216897471cf39a62357456cecd047618a67d572cb679dc9fd
font_01_sfnt_off00006f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F50 11148 bytes
SHA-256: 64d987a829c829915285f4e8200b197b5bf443df3b4da8c2fefc6441d32c4ec5

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