Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd4c14321b35df9…

MALICIOUS

PDF

36.7 KB Created: 2020-08-12 07:02:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08e2d02ff59e573688b345abc1e2ccae SHA-1: ae2ec2228a7b4056134c7b9d46a13810182de392 SHA-256: ddd4c14321b35df9bf5a8b315f225ef1a1e9594459ee13814a9daf7af3171d08
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a known malicious redirector. The document body text, though partially corrupted, includes a URL that is also present in the malicious redirector link, suggesting a lure to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to manipulate search engine results or distribute malicious content. No scripts were extracted from this sample.

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.com/pify?keyword=hematology+lab+equipment+pdf
    • http://files.buiebeadz.com/uploads/1/3/1/4/131483830/zolorixitar-tolakawasob-vanusuwofov.pdf
    • http://files.fortykes.net/uploads/1/3/0/7/130740044/wedar.pdf
    • http://files.silverstarcreek.com/uploads/1/3/1/8/131857419/pekogurazixevej.pdf
    • http://files.juliedowling.net/uploads/1/3/1/1/131163898/xitutoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7254/files/cartoon_guide_to_physics.pdf
    • https://cdn.shopify.com/s/files/1/0437/3364/7509/files/bepijofijunusurowatosix.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3082/files/kojomedosusu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4800/0927/files/african_american_name_generator.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/alimentos_permitidos_para_diabeticos_e_hipertensos.pdf
    • https://cdn.shopify.com/s/files/1/0434/2625/0917/files/77348247950.pdf
    • https://cdn.shopify.com/s/files/1/0431/6751/4788/files/43740104890.pdf
    • https://cdn.shopify.com/s/files/1/0431/5738/9472/files/banking_awareness_arihant_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/2304/6568/files/63200258225.pdf
    • https://cdn.shopify.com/s/files/1/0433/3862/9288/files/german_reading_books_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0438/6871/7216/files/how_to_delete_old_time_machine_backups.pdf
    • https://cdn.shopify.com/s/files/1/0431/6138/7170/files/57345272748.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_off00005165.bin
8b8e535960f26fc5194916701c10a44911e0d4d713c4395df42fbbaba8ecdb35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5165 5416 bytes
font_01_sfnt_off000063bf.bin
ee8d3e34b238dbf428e8cf8075bbccd2bfd47adc347ccc4851cdc187ccaa642a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63BF 10120 bytes

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