Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22cbc6097d93c49…

MALICIOUS

PDF

53.3 KB Created: 2020-10-15 23:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 72c6da7fbe4aa26b48474d5ccb95c88a SHA-1: ddc2ce329ce40d58e5aed30e327d83a94d4da752 SHA-256: e22cbc6097d93c49a345d8c23161d031a14fca330063dcfc2a85b5fce4775ad9
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files hosted on 'mozfiles.com', suggesting a link farm or SEO spam operation. One of the embedded URLs, 'https://gettraff.ru/123?keyword=final+fantasy+12+zodiac+age+bestiary+guide', is flagged as a malicious redirector. The document body, though partially corrupted, contains this URL and references to a video game guide, indicating a lure to drive traffic to malicious infrastructure. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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://gettraff.ru/123?keyword=final+fantasy+12+zodiac+age+bestiary+guide In PDF document text
    • https://site-1041777.mozfiles.com/files/1041777/11932254441.pdfIn PDF document text
    • https://site-1039674.mozfiles.com/files/1039674/1523436411.pdfIn PDF document text
    • https://site-1039381.mozfiles.com/files/1039381/49778921324.pdfIn PDF document text
    • https://site-1042988.mozfiles.com/files/1042988/76003196974.pdfIn PDF document text
    • https://site-1038653.mozfiles.com/files/1038653/pidusem.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/zutilipevozafeguwu.pdfIn PDF document text
    • https://voledobaseju.weebly.com/uploads/1/3/0/9/130969813/ac17477.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/foburadip.pdfIn PDF document text
    • https://site-1039391.mozfiles.com/files/1039391/89084886658.pdfIn PDF document text
    • https://site-1042767.mozfiles.com/files/1042767/papadukogovizerelupib.pdfIn PDF document text
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/3797745.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/4918653.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://cdn.shopify.com/s/files/1/0429/6556/5589/files/blooms_taxonomy_math_activities.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1285/8278/files/varet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5491/5488/files/chemistry_worksheet_stoichiometry_mass_mole_relationships_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/7351/1064/files/dekobolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1165/3279/files/moen_flo_installation_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2357/8789/files/8209292125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4061/0725/files/96564022011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0788/7518/files/wii_motion_plus_remote_charger.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_off00008453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8453 5504 bytes
SHA-256: af0b5ceae5a41bfeddead24eda2ad6d915ece3afdff35c3e23115e453776767c
font_01_sfnt_off00009725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9725 10048 bytes
SHA-256: 199bedcea087147f04a06499caf1786a343d0e52db8bdc2f4055cee0a14c83e9
font_02_sfnt_off0000b97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB97B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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