Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d771ae259bf35c7…

MALICIOUS

PDF

68.5 KB Created: 2021-01-11 10:45:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 12c2e710bed70f7c6456dfb9a23c0ebe SHA-1: b4de60fe881fc71ebc43433243c7c187a31105fe SHA-256: 8d771ae259bf35c788eeb2bfc0c08f1472563dd7cc8a99c43289c72387e54ac6
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with critical heuristics identifying it as a malicious redirector and a link farm. The primary malicious URLs identified are traffmen.ru and batatifenosi.weebly.com, suggesting a phishing or malware distribution campaign. While no scripts were extracted, the PDF structure itself is weaponized to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/aws?utm_term=greetings+conversation+worksheets In PDF document text
    • https://batatifenosi.weebly.com/uploads/1/3/4/5/134513642/vesufasaropugomira.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389816/normal_5f9b75ea31c88.pdfIn PDF document text
    • https://site-1179748.mozfiles.com/files/1179748/coverage_xml_report.pdfIn PDF document text
    • https://site-1197523.mozfiles.com/files/1197523/street_fighter_4_characters_ranked.pdfIn PDF document text
    • https://site-1168267.mozfiles.com/files/1168267/hurst_competition_plus_shifter_super_t10.pdfIn PDF document text
    • https://site-1176088.mozfiles.com/files/1176088/64738061636.pdfIn PDF document text
    • https://site-1180825.mozfiles.com/files/1180825/que_es_el_virus_en_bebes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/introduction_to_exponential_functions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/exam_meme_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/channel_guide_houston.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/chitralahari_movie_songs_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/all_india_radio_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/self_employment_contract_template_uk.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_off0000cf4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4C 5276 bytes
SHA-256: b0c934ff1523ea59efd0f4a06418659d0319689bb0748f8eb2204dfa18ac33e6
font_01_sfnt_off0000e15e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15E 10552 bytes
SHA-256: f72b9b4aa00d196ee4ba9532d3140dd026b9705838d98b01cb6b349c7c741fec

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