Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb905b5ffdff3686…

MALICIOUS

PDF

46.6 KB Created: 2020-10-23 16:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 61f3d163a617b63caea24dfcc2418080 SHA-1: 75e9b33977ad0bf147228e9b9ae4f489141e10ac SHA-256: bb905b5ffdff3686ed8f5d5057b96951e32c85d9c958da4281eede6cdcfe68a6
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ggtraff.ru/pify?keyword=dossier+demande+nationalit%25C3%25A9+fran%25C3%25A7aise+pdf', is flagged as a known malicious redirector. The document body, though heavily garbled, contains text fragments suggesting a lure related to a 'dossier demande nationalité française pdf'. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm or SEO poisoning tactic to obscure the malicious redirector. No scripts were extracted, but the malicious link is the primary indicator of compromise.

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/pify?keyword=dossier+demande+nationalit%25C3%25A9+fran%25C3%25A7aise+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mipeboro/story_of_an_hour_full_text.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/6186262737.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/azo_dyes_used_in_textile_industries.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/66567273266.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29c25a42-dd77-4a3c-82b6-ed6366bf79d4/78536727364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e662d1a7-f0e1-4c79-bd00-808a8559de3b/gixelanurulowogusebetoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6137b0ad-7af8-4cc8-aa88-4b524acf4fa4/41970835930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08a1ee06-e528-46ae-85d0-8df4cdeca551/nesowogisifexinibune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9715/2406/files/toddler_bed_instruction_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1392/9630/files/19339774164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6988/5601/files/ginivilomebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9399/2640/files/elmbrook_school_district_news.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2544/8091/files/47970471001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2439/8528/files/30518247771.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2174/5823/files/70036829730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/3426/7807/files/reward_chart_printable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0623/2229/files/vusubola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3088aeaa-ced4-4702-911f-0f53458b0b39/54161630784.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b911c942-34c3-4400-930a-9314ed100062/gugivisadiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87ea3b47-ce78-4b05-a567-499046b917d7/28840803672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd7c01d4-d0b1-4beb-a208-0d8dd9652b5d/90759261737.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_off000071eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71EB 5512 bytes
SHA-256: ef03213a1414e97ccd32dc794828e50b5d6079a3e3af6f3f49e860b6063d71d7
font_01_sfnt_off00008451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8451 12224 bytes
SHA-256: 7f8a28ea5281435c712019473fb8d9bf7e7a2f8670ddab5e1013ba0da685a326

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