Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69c468227173165…

MALICIOUS

PDF

38.0 KB Created: 2020-09-04 22:35:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 20a85eb9cad41ae96e5e322187adeb7d SHA-1: 1279bece0dc9b42007a8a878d7d7425676ffae77 SHA-256: b69c4682271731653876b4ecc3243413bb1acf2f69b44ae4192585fa79da6217
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL is associated with malicious activity, suggesting an attempt to lead users to a compromised or malicious site. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF links, reinforcing the link farm and redirection attack pattern.

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/pify?keyword=boney+m+video+songs+free In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/cb2bed_828f41a96be54949a311c3ddec985f93.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/dad7b5_2a9027ce30854cf5b269a8ccf7ddcf52.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/704566_bf718111fd574a299eaf6c729c503ac9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/defdb4_3a22f89fdd1449ea8ded45cf1afd70b6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8dde66_638e6165aa414c3a96a2d569123c0e3f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/50c35f_85030d6562324c83ac33623434260a62.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/197ed4_1bafb21657d64cdf823a3f85e3bbc8f8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5262df_afa9ddd8e4ba4f31b4385ac0bb29270b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7d21c0_e3ee8d94ce8649e0a83185fd19de72a1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/05900a_3246cddd82ce4fbfba779a831de24152.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/804ff6_2f8c25cc27a84e8ca65cb4373f2432fa.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ee4d88_014418a63a114d99abcd64d3b7b37c59.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/610d21_e6e7ed225b0148458fcd5637ebbc661a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/963627_b7ad43ec75684050a36f8bda383f414b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/16a96a_f4ce27960347496586646433e38cc4e4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4922/2298/files/44604569238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3404/9703/files/84047226293.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/529617177.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_off0000518f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x518F 5196 bytes
SHA-256: 19c4eb91b0332a8d1dabac266815a9a49b2c974f89ea74e234489f00c137a244
font_01_sfnt_off00006342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6342 12524 bytes
SHA-256: 43f5173d083b23e0bc934b5248c4c6e5146ea9b23ebc38dcc6a549e1d2d251bb

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