Malicious PDF — malware analysis report

Static analysis result for SHA-256 9adaba177d63ded5…

MALICIOUS

PDF

63.3 KB Created: 2020-11-25 09:14:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9837ba4507f95126a4f02ee6b11aa004 SHA-1: 53849411c0b061446bfc5b29782fb88858706b1e SHA-256: 9adaba177d63ded5d1acba46072e0fe04787e76ae06e581481a9e0fe5c0dba63
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. The embedded links, such as 'https://ggtraff.ru/123?utm_term=economic+science+association+conference+2019', point to known malicious redirector infrastructure. The document's structure suggests it functions as a link farm, directing users to various disposable hosting sites, which is a common tactic for distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/123?utm_term=economic+science+association+conference+2019
    • https://cdn-cms.f-static.net/uploads/4378152/normal_5fa5681345cd8.pdf
    • https://tesazosutev.weebly.com/uploads/1/3/4/7/134714215/1913816.pdf
    • https://cdn-cms.f-static.net/uploads/4448332/normal_5f9fc16004328.pdf
    • https://suzabotofofetab.weebly.com/uploads/1/3/4/7/134739937/pikudawetirajun-wevukonumor.pdf
    • https://muxekedov.weebly.com/uploads/1/3/4/7/134706321/zuveborazikukop_bepasumadu_xirulopinek_tumiwajefave.pdf
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/gavuki_xobewejilaz_rifapi.pdf
    • https://cdn-cms.f-static.net/uploads/4369903/normal_5f9474d55031c.pdf
    • https://todurudivi.weebly.com/uploads/1/3/4/3/134344361/pilajosij_jijetikanijiwos_jewovitararep_sokej.pdf
    • https://kolerekum.weebly.com/uploads/1/3/4/3/134350376/lulomuzilasoluk.pdf
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/d6b27fdd.pdf
    • https://cdn-cms.f-static.net/uploads/4450889/normal_5fb97bb593a28.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0ba377ee-ce4e-4ff8-b76b-8c4c134ef70d/.pdf
    • https://uploads.strikinglycdn.com/files/fe858b64-bab8-41da-95ae-88e4f2862146/godiki.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b564.bin
b308b63e5dcec8fc6ab9dbbf19d7011d2a45bc041b04c25fe26437c392b8bec4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB564 5436 bytes
font_01_sfnt_off0000c7ce.bin
43a113509ca09531b4033d48d20be1206ae877a15c2b0af929288c37e21bf989		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7CE 12712 bytes

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