Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5b03949dd230db…

MALICIOUS

PDF

48.5 KB Created: 2020-11-06 08:03:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 334015fecfbd4d9a726658be61b28f01 SHA-1: 912fe10e92039d3a30a940dd66079523bf2f2e0c SHA-256: 0d5b03949dd230db0cc637f4e809b4d282d9decd3b480d4701ce93198db77038
96 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in SEO link farms to manipulate search engine rankings or to host malicious content. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs, specifically one pointing to 'trafficel.ru', suggests an attempt to redirect the user to a potentially harmful site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/123?keyword=shelby+county+driver+license+office PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404966/normal_5fa277cf17868.pdfIn PDF document text
    • https://tidoxanarapora.weebly.com/uploads/1/3/2/7/132710787/19885851.pdfIn PDF document text
    • https://lugesivewamaxiz.weebly.com/uploads/1/3/4/5/134596289/kewov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/napoledunadigo/nikon_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/8827533946.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/20558184863.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/xerostomia_management.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/nc_music_essential_standards.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/dewalt_belt_clip_and_bit_holder.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/advanced_engineering_mathematics_10th.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/north_carolina_state_mathematics_contest.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/86740303737.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000703b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x703B 5184 bytes
SHA-256: 012bc1cea4482b128a3eab562ea250dc9115b0a087932cc466bea433dca7dc74
font_01_sfnt_off000081d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D0 10792 bytes
SHA-256: 7d32895f9a5f794aeeb291ac03d661f69f24bc363d7a0ca84e1611430e3882f0
font_02_sfnt_off0000a6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6C7 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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