Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d4b3d1f1c098d9d…

MALICIOUS

PDF

41.8 KB Created: 2020-09-03 03:02:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54238719f88622d6d6a100eaca8fdd1d SHA-1: 4e450e0e9f08cbc05d11fafa116101561278ea32 SHA-256: 7d4b3d1f1c098d9d5343735513435d100cf7ef66663c593c17287e74781140fb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify-hosted PDFs, suggesting an attempt at SEO poisoning or link farming. One critical heuristic identified a link to a known malicious redirector, ttraff.link, which is likely the primary malicious objective. The ML classifier strongly supports the malicious nature of this PDF.

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.link/wix?keyword=panasonic+sd-+2500+wxc+automatic+breadmaker+manual
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7809/0901/files/android_chrome_client_certificate_authentication.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/javascript_array_indexof.pdf
    • https://cdn.shopify.com/s/files/1/0436/2692/2146/files/megapath_speed_test.pdf
    • https://cdn.shopify.com/s/files/1/0437/2329/2822/files/darolakasam.pdf
    • https://cdn.shopify.com/s/files/1/0434/0429/6348/files/71348768952.pdf
    • https://cdn.shopify.com/s/files/1/0435/4896/7061/files/the_courtship_of_eddie_s_father_cast.pdf
    • https://cdn.shopify.com/s/files/1/0429/7284/0090/files/alfabetidad_visual_dondis.pdf
    • https://cdn.shopify.com/s/files/1/0436/1669/8526/files/timothy_sykes_dvd_download.pdf
    • https://cdn.shopify.com/s/files/1/0448/3586/4736/files/denukotamofafumabad.pdf
    • https://cdn.shopify.com/s/files/1/0435/8583/1070/files/fifirofopojigadatewo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2410/5124/files/tetogeribigilo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8115/4198/files/bug_tracking_tool_bugzilla_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0429/7123/4467/files/82470478124.pdf
    • https://cdn.shopify.com/s/files/1/0432/0867/1394/files/90793000193.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_off00005869.bin
91a64203b589465a75ea916645f26fccecc0b47cca5f928e32b4db1177ae8880		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5869 2456 bytes
font_01_sfnt_off00006349.bin
9809246c172f5b57e98f67a0efba8f637b09eb30f8c551682b86292d91714221		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6349 5880 bytes
font_02_sfnt_off00007752.bin
6576ae1fc7db07ec13f9817a3cc9b012267b85454dfd1e622f5940fc96fa7b65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7752 10304 bytes

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