Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d1f55cfabfb95b1…

MALICIOUS

PDF

41.0 KB Created: 2020-08-17 00:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c9a4b3098558356b1bc5185e34f3241 SHA-1: 00c3da8214f95e8289689488fdf0562dc1ee8f4b SHA-256: 2d1f55cfabfb95b1edbaf0c32361e84cedb9210cbd6942f69e838e26a086f205
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a PDF link farm. One of the primary links directs to a known malicious redirector, ttraff.com, which is likely used to funnel victims to malicious content. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous links, including those to potentially benign Shopify URLs and a suspicious URL on minneysyachtsurplus.com, suggests a broad distribution or SEO-poisoning attempt to lure users to malicious sites.

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=biased+news+reporting
    • http://files.minneysyachtsurplus.com/uploads/1/3/2/7/132710797/9d79b7d.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/capteur_de_temprature_automobile.pdf
    • https://cdn.shopify.com/s/files/1/0438/6239/2992/files/attention_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0435/1947/5866/files/freelance_graphic_designer_quote_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/3831/8487/files/ravarapasanub.pdf
    • https://cdn.shopify.com/s/files/1/0435/7183/9135/files/dozut.pdf
    • https://cdn.shopify.com/s/files/1/0432/7270/0057/files/how_to_be_a_better_husband_and_father_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/4750/1474/files/e2_80_9cmonoline_e2_80_9d_pen.pdf
    • https://cdn.shopify.com/s/files/1/0434/1625/6677/files/lekufatutelepovune.pdf
    • https://cdn.shopify.com/s/files/1/0440/5723/1525/files/the_office_the_accountants.pdf
    • https://cdn.shopify.com/s/files/1/0437/9751/2354/files/fesatuditemenijafif.pdf
    • https://cdn.shopify.com/s/files/1/0428/8295/7478/files/nigedowopugebebejupugalur.pdf
    • https://cdn.shopify.com/s/files/1/0434/5007/3240/files/bsc_nursing_4th_year_syllabus_according_to_inc.pdf
    • https://cdn.shopify.com/s/files/1/0432/0804/8808/files/ccie_sp_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/0842/6147/files/fatex.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7138/files/zinubadanenezenegoburu.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_off00006242.bin
efd04028383a23f762960ab532fb5acad04651ea261b2074d9bf2815f3f1c606		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6242 5236 bytes
font_01_sfnt_off0000742a.bin
5f3ade89e43f55318b917b06098536e44b5182b7a65987de84bdf486f7133c38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x742A 10288 bytes

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