Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2afb29234b548dc…

MALICIOUS

PDF

58.6 KB Created: 2020-10-29 11:58:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 07a82d1238bb4fb2c07294c65e105d0d SHA-1: 155e9967d1adb982e153e1408844c3e2100b891f SHA-256: a2afb29234b548dc70dd04603d8e84bf83ba7cc859cb66dfca6cac18b9b71eda
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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=all+my+sons+arthur+miller+summary 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/gedimuta/ejercicios_present_perfect_simple_just_yet_already.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/13463021235.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/13879285865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45d0e324-ce38-4a85-9278-9cbbecb12c4e/60032793829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a45b2000-0329-4d62-a9da-d6ff5ff8bb54/singer_sewing_machine_301_serial_numbers.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/fegogixomuxinajul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8358/6467/files/tarkett_vct_maintenance_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80ca7ea2-bdc4-4542-8206-9b7664a7f14f/51753948209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b15b8ef1-b2bb-4614-af39-3052540b36aa/litijosazuvonawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2980/6242/files/26120901146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7122/5502/files/vezamawukavavabuduvon.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/deep_reinforcement_learning_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c884784a-9fab-4c42-9cda-2e3fa1c05def/2836932795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6564/5473/files/33935814480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d1da56b-883e-4239-8702-be980f5fb4fd/thermomix_apple_and_mint_jelly.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/bharatanatyam_adavus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5614/2754/files/police_phonetic_alphabet_usa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4956/4351/files/54090988900.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/91202748981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8960/6838/files/voputosimavolupaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/9380/5206/files/mtn_mobile_money.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5856/0661/files/2004_mustang_gt_premium_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64cdcc4e-a1dc-4ae6-8f47-77de180df0d3/rirarogeluxixunuvepur.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_off0000a4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4D8 5016 bytes
SHA-256: 33f702a9a90f56847b5f3cd1c8b4026333486928d5ac32c14106ab4789a6d8f8
font_01_sfnt_off0000b5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5BC 11748 bytes
SHA-256: 10f030765b0ce70080e2e2ede955141569a1945a88e51b656ac871604cb7cd44

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