Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae44a6b2aea910b6…

MALICIOUS

PDF

41.8 KB Created: 2020-09-05 00:12:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: de5a70ce9536ed4a05eb6fa6d2a9ff53 SHA-1: 2637299a5b70d465ba590aee387b45331d6b7ace SHA-256: ae44a6b2aea910b60d7a878539f665b59d80b57b9480c640be1854201ddafcde
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.club, which is likely used to obscure the final destination of the malicious payload. The document also contains a large number of links to other PDFs hosted on Shopify, suggesting a link farm or SEO manipulation tactic to increase visibility. The ML classifier strongly indicated maliciousness, and the presence of a redirector link confirms a malicious intent to lead the user to harmful 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.club/pify?keyword=calibre+portable+for+pc In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3840/7845/files/polowawanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2511/2988/files/86500535980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2956/0486/files/tony_robbins_business_mastery_workbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7802/5377/files/adn_polimerasa_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5934/6599/files/20998018407.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d1fcfc_0de9a974dd644affbca6b79964792183.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f3cb45_8ecd6e4376b64dcc92653d3c35fbde51.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4d548e_2bf9a9d946414bcebd86a04e64383ad0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b28ae2_70cd4517bcd54511ae3f2a5f31e23feb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5b5da7_bd6971e277ca49e99241471bbf30121b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_2fb2fd4edc2844a7b26d68894e4b97a7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c20ea7_6c0a928e79254ee6890fd796b98a4fe3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8ab72e_62bdac8e8dd84df7b12f9e9b59f9e560.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/197ed4_2e5c9c0402ee495b8f96c6a9c0e43428.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_adcf0e3d827b45dfb0d27593129c00a1.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F3 4876 bytes
SHA-256: fa76a2f45e13e1247fd5ac942cd27df2baabe71ab97c9f97b092f40658792cbc
font_01_sfnt_off00007795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7795 10180 bytes
SHA-256: a66966d4ca354d7995d8f4322c92d8d3c719fde87fc79547c1184e08693f6aa8

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