Malicious PDF — malware analysis report

Static analysis result for SHA-256 3825facd004eee9a…

MALICIOUS

PDF

94.9 KB Created: 2020-09-06 00:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d0f2b512a676c342a108399fb3e132ee SHA-1: ef0baaa4cfcc6deeb3ff8527541ba838c7caf0c3 SHA-256: 3825facd004eee9a16dcea3a7b35b7677d35f28da49406e10469766bab145b83
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.me, which is disguised with a keyword related to a plane crash. Additionally, the PDF hosts a large number of external links, many pointing to Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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/wix?keyword=chinese+plane+crash+report 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/1/0434/4964/7261/files/69311425176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1235/6253/files/kepipobaxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7670/4664/files/chrome_os_for_raspberry_pi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4638/5317/files/free_budget_app_for_android_and_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7812/3669/files/84137813679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4946/0636/files/fabrication_of_grass_cutting_machine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3886/6584/files/300_crochet_stitches.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0409/2839/files/sanjay_dutt_biography_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4690/3709/files/abstract_article.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/724fb5_1886fd7d9e864a8290cbcbd1dec303c8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6cfc61_b15453f2927d48e7bd0398acd3b6e377.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c1de29_1ebb14c1062e465a8d66f19e1e05dfc9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3550/8381/files/44364419647.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mipin.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000103b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x103B7 14232 bytes
SHA-256: 3dd377c38929e086969bead3d66aba8ca01e2a0b6e94193eee60e88b8c7586a8
font_01_sfnt_off000131b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131B8 4928 bytes
SHA-256: 7e0945eba3c6f2f750fef94bf195aacd48d9b33b003222454a4cbf64694cb514
font_02_sfnt_off0001426c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1426C 13752 bytes
SHA-256: 28d7b7618757fec2ecf7b1b4eed3250da50d191466aa0a0f412cfda375fda973

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