Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f9dc51d7ec22f7f…

MALICIOUS

PDF

46.0 KB Created: 2020-09-01 22:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30c2b8ad299ddacb87317e659fa0abf2 SHA-1: 8fa14d0a8f72b18f930a544e33eb634484b06c0a SHA-256: 1f9dc51d7ec22f7f53b3e2419258723074b9a408ac717319fb2901e2931f2a10
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.club'. This indicates the document's primary purpose is to lure users to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=interplanetary+enhanced+edition+guide
    • https://cdn.shopify.com/s/files/1/0440/2964/0854/files/background_images_free_hd.pdf
    • https://cdn.shopify.com/s/files/1/0434/0695/0561/files/42024395571.pdf
    • https://cdn.shopify.com/s/files/1/0432/2315/4847/files/31281537452.pdf
    • https://static.usrfiles.com/ugd/0aab01_1038155971b04803bcaca453ec1fdd1c.pdf
    • https://static.usrfiles.com/ugd/b8c837_5914985513b54c4db41644b2db3b7418.pdf
    • https://static.usrfiles.com/ugd/89363e_d7e571be78e947c1a2e2b6853f1cdbed.pdf
    • https://static.usrfiles.com/ugd/b8c837_da5208c95279464f8ddee75f4edd6cd7.pdf
    • https://static.usrfiles.com/ugd/bf07b1_f31cf83c83b2463c84bd493917b24088.pdf
    • https://static.usrfiles.com/ugd/1decf9_64074ce2c4cd44d3b7ff8a2ae9786e17.pdf
    • https://static.usrfiles.com/ugd/1decf9_649a6c08ebc24822987bc5d68e76c9d6.pdf
    • https://cdn.shopify.com/s/files/1/0438/6593/1936/files/tepupewutiniruragezipi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5004/8419/files/vakinidami.pdf
    • https://cdn.shopify.com/s/files/1/0436/8079/2729/files/3rd_grade_eog_math_practice_worksheets_nc.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074d8.bin
9ff3694bdca124d30db48dd3cb0e851fd26a34090f6c2611bd99c4d31efcef87
pdf-font-stream PDF embedded font (sfnt) at offset 0x74D8 5196 bytes
font_01_sfnt_off00008683.bin
97afb4493374c01e4e26d5012c2b2a6c5fb92af1d02528b19e249b24a344baa1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8683 10716 bytes