Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad206fb09e92b225…

MALICIOUS

PDF

48.7 KB Created: 2020-10-06 17:47:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e48c78d7188215dee4b91fbf4494c90f SHA-1: 33e3f8930fbf5ecdcc72f7390204fe2445cdb626 SHA-256: ad206fb09e92b2259098b839ef6ee3bd0c478fae7a8e8ee18c23381c4161102b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ggtraff.ru/strik?keyword=equa%25C3%25A7%25C3%25B5es+literais+exercicios+8o+ano+doc'. This suggests the document is designed to lure users to a malicious site, likely for phishing or malware distribution. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm strategy to improve SEO for malicious content.

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://ggtraff.ru/strik?keyword=equa%25C3%25A7%25C3%25B5es+literais+exercicios+8o+ano+doc In PDF document text
    • https://site-1039754.mozfiles.com/files/1039754/10258057897.pdfIn PDF document text
    • https://site-1038897.mozfiles.com/files/1038897/figubaregagenadolabanofix.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/1/0435/9097/5647/files/xepifamogufazepog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/gerulajezubosapemefope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0629/8781/files/download_cartoon_wars_hack_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/9218/1660/files/what_alice_forgot_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8160/5018/files/ps4_cords_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6675/2164/files/pewdiepie_this_book_loves_you.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5491/5488/files/could_vs_can_polite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/5148/7910/files/zijasusizufininijodajaxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9377/3467/files/45355566386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5827/4205/files/ornament_storage_box.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_off000061c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C8 5560 bytes
SHA-256: fbfe001c9ad3c923057fa24a43856417e7e5cae7ee7799b7f56c812e03c4351a
font_01_sfnt_off0000742f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x742F 17488 bytes
SHA-256: 28721871701dd99502c4276e0d618832ad72f6a5e88d68a25628fbb14bb17522
font_02_sfnt_off0000a54c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA54C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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