Malicious PDF — malware analysis report

Static analysis result for SHA-256 705807d5bec6d180…

MALICIOUS

PDF

42.4 KB Created: 2020-08-12 22:58:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c08bd1bae75f0c3e832d4b71c0026393 SHA-1: ae3ff68504f8977538a93206639c6349c6c981a3 SHA-256: 705807d5bec6d180fd1f7320d902f5775b32bbbff7f10a6772dd9a3f48383cc1
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as search results for free PDF downloads, specifically mentioning "Sanford guide 2019 pdf free download". The primary malicious URL, https://ttraff.ru/, is identified as a redirector to potentially malicious content. While no scripts were extracted, the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt, likely using a technique similar to T1566.001 (Spearphishing Attachment) to deliver further 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://ttraff.ru/wb?keyword=sanford%20guide%202019%20pdf%20free%20download
    • http://files.randomlakeeducationfoundation.com/uploads/1/3/2/6/132695280/bagatededevoku.pdf
    • http://pupidog.parentlednetwork.org/uploads/1/3/2/8/132815002/gebibosukitu_giviv_sakaroj.pdf
    • http://kufanexaz.addisonwilhite.com/uploads/1/3/0/8/130874253/raroxozimatu.pdf
    • http://files.mtbsiteservicesbusiness.com/uploads/1/3/0/9/130969002/c4babc65b1fcc0.pdf
    • http://files.strongmed.net/uploads/1/3/1/4/131453194/4410822.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/24352782215.pdf
    • https://cdn.shopify.com/s/files/1/0431/5221/2130/files/livro_alcoro_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0438/0177/2192/files/terraria_black_lens.pdf
    • https://cdn.shopify.com/s/files/1/0428/1666/7814/files/54495932223.pdf
    • https://cdn.shopify.com/s/files/1/0430/9729/2949/files/surajudajilutu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3062/files/vargas_llosa_biografia.pdf
    • https://cdn.shopify.com/s/files/1/0432/9462/1862/files/add-_apt-_repository_command_not_found.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5082/files/44081610952.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51730359377.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/94064070281.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/pajejajitetalemamirozofe.pdf
    • https://cdn.shopify.com/s/files/1/0445/7309/8143/files/can_you_open_in_paint.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053dc.bin
c4afead5eabfb6f2b31b97b4fb2b4cd061e70eac1a8a112283375030ea5309fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53DC 5512 bytes
font_01_sfnt_off000066ad.bin
27de59f2a41bb2851e8b49906adffa0a5cbaaf4edce4422485edab814502f39f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66AD 12192 bytes
font_02_sfnt_off00008e3d.bin
8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E3D 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.