Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f038a0a4dc01da2…

MALICIOUS

PDF

46.0 KB Created: 2020-08-14 13:26:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 374fdfcc00542dd64dbbdf871c11d44b SHA-1: 02cfb86b73aff04cb68c68dad3cf34b458775434 SHA-256: 3f038a0a4dc01da273f4ddc4c6222ea79bded5ab59291a4969afc0d3c2ba317a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains text related to a 'Macbook pro buying guide 2018' and the malicious URL, suggesting a lure to entice clicks. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to distribute the malicious payload.

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=macbook+pro+buying+guide+2018
    • http://files.bodypercussionclassroom.com/uploads/1/3/1/1/131163996/wasukopofep.pdf
    • http://mupimeg.senseinelsonius.com/uploads/1/3/1/6/131606875/56044ad.pdf
    • http://wosuzuj.talesfromasketchyartist.com/uploads/1/3/1/1/131164250/8d45f3d7c2.pdf
    • http://files.kerrionmission.com/uploads/1/3/2/6/132681452/wepodamus.pdf
    • http://files.pinoyny.com/uploads/1/3/1/4/131408068/2938127.pdf
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/gobumufojes.pdf
    • https://cdn.shopify.com/s/files/1/0435/3182/9412/files/acidosis_metabolica_hipercloremica.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kewosa.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7741/files/stereochemistry_of_addition_reaction.pdf
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/teregufumipotumemires.pdf
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/4468166322.pdf
    • https://cdn.shopify.com/s/files/1/0440/2518/4421/files/najojuxikewuwejexin.pdf
    • https://cdn.shopify.com/s/files/1/0436/6296/6937/files/renaissance_art_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/39244239527.pdf
    • https://cdn.shopify.com/s/files/1/0435/3222/2615/files/60180261676.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/pdf_editor_free_online_without_watermark.pdf
    • https://cdn.shopify.com/s/files/1/0433/2650/5128/files/pdf_books_download_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4154/files/26367268374.pdf
    • https://cdn.shopify.com/s/files/1/0441/0189/4296/files/social_skills_training_worksheets_for_adults.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000736f.bin
4e895a497ebd09c64de1e98ab44d669e96bfa40605eb61a9f99c3c43bed2782a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x736F 5860 bytes
font_01_sfnt_off00008777.bin
87b0d754f20409b31a7f5705af6674f8e8de2f50a672045bf9c0aa7c27841e69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8777 10248 bytes

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