Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c0d7b45e67b50a…

MALICIOUS

PDF

38.6 KB Created: 2020-09-08 16:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19e11af8e7f3b16358528c0cdb027724 SHA-1: 1751e6167f55cd18a2d20c347a03d6a61f857280 SHA-256: 65c0d7b45e67b50a2477ee36416c0a4051e88b780a79639d57cdf5c7133e0006
162 Risk Score

Malware Insights

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

The PDF contains a link disguised as a search result for 'Beatles let it be sheet music pdf'. This link, 'https://ttraff.link/wix?keyword=beatles+let+it+be+sheet+music+pdf', is flagged as a malicious redirector. The document also contains a large number of embedded links to Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness, and the 'SE_INVOICE_LURE' heuristic suggests a deceptive pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=beatles+let+it+be+sheet+music+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/1537/0912/files/81772944749.pdf
    • https://cdn.shopify.com/s/files/1/0429/3787/6639/files/makalah_obat_anti_jamur.pdf
    • https://cdn.shopify.com/s/files/1/0431/3687/6706/files/tp_link_wifi_pci_card_driver.pdf
    • https://cdn.shopify.com/s/files/1/0431/6269/7894/files/aula_de_ingles_2_bully_android.pdf
    • https://cdn.shopify.com/s/files/1/0461/2017/3732/files/4441187656.pdf
    • https://cdn.shopify.com/s/files/1/0463/0134/8002/files/31849583859.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/69316878865.pdf
    • https://cdn.shopify.com/s/files/1/0437/4098/7543/files/download_the_last_witch_hunter_movie.pdf
    • https://cdn.shopify.com/s/files/1/0440/9524/2392/files/jeripipirosijufewirusiwe.pdf
    • https://cdn.shopify.com/s/files/1/0440/8649/3349/files/complete_bipartite_graph.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37872338034.pdf
    • https://cdn.shopify.com/s/files/1/0438/6953/6411/files/dsc_1616_manual.pdf
    • https://cdn.shopify.com/s/files/1/0448/3081/8461/files/anime_girl_wallpaper_hd.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/the_boyfriend_list_e_lockhart.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059b8.bin
16f5238897c17b495abe20b6cca72fba8396be2177d6e186c8387ad99dafe779		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59B8 5488 bytes
font_01_sfnt_off00006c37.bin
c5102fdd5305dc088478fe13e71b2e4bb1728d580114a017f4608276107cc1a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C37 9768 bytes

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