Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b28ae78e5d1537…

MALICIOUS

PDF

52.6 KB Created: 2020-09-05 03:05:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30c08b48a75cece26caed21ff6a39ce7 SHA-1: e8b832bd97dc82a47c7b65bd4bef3c9327bdaadd SHA-256: 06b28ae78e5d1537a56c5310a7f1d492132b6ffe155b0fb2d726c6ae45d7f5b5
154 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, including one identified as a malicious redirector. The primary malicious link, https://ttraff.me/pify?keyword=ch+2+maths+class+10+pdf, is presented as educational content to entice users to click. The document's structure and the presence of many Shopify links suggest an attempt to mask malicious activity within a large number of seemingly benign URLs, likely for SEO manipulation or to hide the malicious redirector among legitimate-looking 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.me/pify?keyword=ch+2+maths+class+10+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0462/1765/8521/files/legal_services_authority_act.pdf
    • https://cdn.shopify.com/s/files/1/0459/2238/6069/files/megutinij.pdf
    • https://cdn.shopify.com/s/files/1/0460/1869/1239/files/bharatanatyam_songs_free_videos.pdf
    • https://cdn.shopify.com/s/files/1/0434/3067/4597/files/9592208367.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xakikalimakimoxe.pdf
    • https://cdn.shopify.com/s/files/1/0440/8927/8616/files/le_millionnaire_marc_fisher_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0437/5517/6097/files/bogotazo_libro.pdf
    • https://cdn.shopify.com/s/files/1/0435/2190/0696/files/texas_130-_u.pdf
    • https://cdn.shopify.com/s/files/1/0436/5120/3225/files/ordnance_survey_puzzle_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/1481/4885/files/50440896931.pdf
    • https://cdn.shopify.com/s/files/1/0436/3668/7008/files/mscorlib_pdb_not_loaded.pdf
    • https://cdn.shopify.com/s/files/1/0431/7013/6230/files/archicad_20_tutorial_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doxufuvezemog.pdf
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/lapomivigozipuz.pdf
    • https://cdn.shopify.com/s/files/1/0435/9408/8611/files/88263439661.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/20604720305.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7680/files/lfs_range_rover_yamas_indir.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073ee.bin
123744ccdefed9494155cf6e015b6669e38deccf365cc6f8e338ec17a5f5c853		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73EE 5528 bytes
font_01_sfnt_off00008698.bin
9d08ccb250386ebffacf01e2b446dbc68592091015e6c9a31f703a04a1310874		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8698 12880 bytes
font_02_sfnt_off0000b06a.bin
33244761dd26184cc45e804f625a7373fc7b1bf6c61cefab7649c9725e879285		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB06A 16152 bytes

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