Malicious PDF — malware analysis report

Static analysis result for SHA-256 00626dd38aa1475f…

MALICIOUS

PDF

41.1 KB Created: 2020-08-23 15:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ed253476f8b597519005a469e3bb39b SHA-1: 4b5b4a3b704558653297089b1af939f890ae84e3 SHA-256: 00626dd38aa1475f2dc3db98f4d77acf75d5c282a4c23598d1cac014ffd44e38
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text referencing 'break even graph excel template' and a URL that aligns with this lure. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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.ru/pify?keyword=break+even+graph+excel+template
    • http://newud.bordencreeklabradors.com/uploads/1/3/1/4/131483167/jumeki.pdf
    • http://files.lccpslibrary.org/uploads/1/3/1/8/131856991/jarusade-rikip-togekarozawa-daxubexogar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/2679/1072/files/odisha_b._ed_merit_list_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1576/6177/files/72158416331.pdf
    • https://cdn.shopify.com/s/files/1/0439/1393/7064/files/98431952429.pdf
    • https://cdn.shopify.com/s/files/1/0435/1826/3448/files/overdrive_media_console.pdf
    • https://cdn.shopify.com/s/files/1/0437/9924/9058/files/sample_of_appointment_letter_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0444/3337/5399/files/organizational_effectiveness_definition.pdf
    • https://cdn.shopify.com/s/files/1/0441/0825/1288/files/vocabulary_for_ielts_with_answer.pdf
    • https://cdn.shopify.com/s/files/1/0449/4082/0635/files/12644018769.pdf
    • https://cdn.shopify.com/s/files/1/0435/4513/3215/files/bohemian_rhapsody_partitura_piano.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31321710084.pdf
    • https://cdn.shopify.com/s/files/1/0432/2328/5928/files/6054458132.pdf
    • https://cdn.shopify.com/s/files/1/0462/8470/1856/files/aisi_deewangi_video_song_mp4.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_off000063b8.bin
e16c14f8bc29badf02e32f24f8ec7a7f5f567d37ca2edfedf3353b1363eca3de
pdf-font-stream PDF embedded font (sfnt) at offset 0x63B8 5408 bytes
font_01_sfnt_off000075fb.bin
e0b398c1f1dff8c30618ffae12f4011b798ae34eb9c2d6ec52547d68a7575b90
pdf-font-stream PDF embedded font (sfnt) at offset 0x75FB 9908 bytes