Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d04f35f720d9dcc…

MALICIOUS

PDF

66.4 KB Created: 2021-01-15 00:34:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0619aea9d68def9461697efc567ed75e SHA-1: be77a474f37d428bfacc33234389832f4d93ed8c SHA-256: 9d04f35f720d9dcce3639a33def06d7f60fe7126a1419d2b3a56bea712b397c2
214 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with critical heuristics identifying it as a malicious redirector and a link farm. One of the primary links, 'https://ggtraff.ru/aws?utm_term=ac+market+apk+pour+android', is flagged as malicious. The ML classifier and ClamAV detection further support the malicious nature of this document, indicating it's likely a phishing or malware distribution lure.

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.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=ac+market+apk+pour+android
    • https://static.s123-cdn-static.com/uploads/4420238/normal_5ffb440ce83d9.pdf
    • https://cdn.sqhk.co/litopozuf/jijpTbU/coloring_beyblade_burst_turbo.pdf
    • https://zutiwemozebej.weebly.com/uploads/1/3/2/7/132712207/nijovifikofabesan.pdf
    • https://cdn.sqhk.co/lerotakisisa/2hchbPQ/sixukepoke.pdf
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/pofej.pdf
    • https://sawilemevopano.weebly.com/uploads/1/3/4/5/134577559/8990625.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/vaxebisapesi/chest_wall_deformity_correction_center.pdf
    • https://s3.amazonaws.com/dugibabafod/xokud.pdf
    • https://s3.amazonaws.com/netinuwa/chainama_college_application_form.pdf
    • https://s3.amazonaws.com/limewub/33251635773.pdf
    • https://s3.amazonaws.com/banula/principles_of_government_worksheet.pdf
    • https://s3.amazonaws.com/sisaxu/balance_general_en_forma_de_reporte_ejercicios.pdf
    • https://s3.amazonaws.com/defujo/43050418194.pdf
    • https://s3.amazonaws.com/gumegulaxi/vekibivu.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_off0000bd54.bin
5ff31b60db8b7bcc582be93ca3f824cc213a078d7f73c185b48cd806874cd522		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD54 4944 bytes
font_01_sfnt_off0000cdf7.bin
232ccab24ebb36277a2ab84b8860c3599cf53c3c51491c97a49e2de35043d8f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF7 9652 bytes
font_02_sfnt_off0000ef04.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF04 4324 bytes

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