Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa98d2a04d3e855c…

MALICIOUS

PDF

50.8 KB Created: 2020-10-02 04:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ca0092e640bb5092d26b1999bc403f4d SHA-1: d10c1140eb247fcf9c995940b3389ae26abd9ef3 SHA-256: aa98d2a04d3e855cea0fe500d016cff1bdd09a32ad1c4d4eb224f85917dd1bb8
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs that lead to a redirector service, which is a common tactic for distributing malware or phishing content. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of at least one of these links. The document body, though heavily obfuscated, contains a URL that appears to be part of the 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 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.link/pify?keyword=big+dog+diablo+mower+prices In PDF document text
    • http://files.chicopeemabouncehouserentals.com/uploads/1/3/0/7/130776043/e4ca5a57.pdfIn PDF document text
    • http://rawesopu.lovehealthyme.com/uploads/1/3/0/8/130874411/34c71c.pdfIn PDF document text
    • https://site-1041208.mozfiles.com/files/1041208/98566004180.pdfIn PDF document text
    • https://site-1036980.mozfiles.com/files/1036980/mapiravozopude.pdfIn PDF document text
    • https://site-1038806.mozfiles.com/files/1038806/dasivibazorazaxadab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9009f8d1-df13-4255-b523-73731d4845c5/52422624764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cb25aa5-feee-4b73-a46b-a6d954537dc6/givonifigezukag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/704fa8ec-9182-4078-983a-e5eff7853914/sipal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/525ae76e-1d27-4757-8e28-1b1e8646755d/xotiwuwifavamivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc23655f-36ab-4310-9e86-c87bd1be400d/gesaribevanib.pdfIn PDF document text
    • http://wuzadi.creativetimenyc.square.site/uploads/1/3/1/8/131857818/sowujoz_zoxibavipiw.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_off00008818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8818 5672 bytes
SHA-256: c43f521f5768652f9dc7eed0395c365330187af35b3ae5383f03850c8ad9af8d
font_01_sfnt_off00009b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B59 10260 bytes
SHA-256: cd98f49dffa32243a785b71c23e4e92679409c17e9c927c765741b69b57e24fc

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