Malicious PDF — malware analysis report

Static analysis result for SHA-256 14c6441d5c091232…

MALICIOUS

PDF

41.7 KB Created: 2020-09-16 01:14:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 32d029af04db10c0a23fff814fe176c5 SHA-1: 77d609988910592a7b5778e1e850659a729a865b SHA-256: 14c6441d5c0912324d2e5d031c91c24dcced1be28b5e2a59e7dd8d1ea306f312
162 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirector infrastructure and a large number of external PDF links, suggesting a link farm. The presence of a 'download button' lure further supports a phishing or scam attempt. While no scripts were extracted, the embedded URLs and the PDF structure strongly suggest a malicious redirector chain designed to lead users to harmful content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=mean+girls+monologue In PDF document text
    • http://files.fcninternational.org/uploads/1/3/1/3/131380598/tukugegorubuwiwekod.pdfIn PDF document text
    • http://ruwima.anitabelli.com/uploads/1/3/1/6/131606575/18e05684efb5a.pdfIn 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/704988_f55df270adeb46b48bfadfc8e6f540c4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f515ca_e59ca1658c2b49f185f1ab70dca8506f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c33f71_224a329fbf3940719635ebc0811f4f73.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7be1cd_40f032dd1124429a977301f7645cc59e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b47706_fe2536028fd64b01be2899aeff1f9c68.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/abd6ea_58f26f0c14964533b00a83de6264c758.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3de8a6_be51d9c465154397be21534c1932687b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/113e89_1092c9d8658a4a2a9874b71831b7078e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1b8612_4558bb4a762a4e078d7bbac487a55ac3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/dc6899_87071ca7302f4f87822e0154f88be958.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7be1cd_6f4b5e21a9294a4687091e52fa78c0b9.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_off000065e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E6 5012 bytes
SHA-256: 7054a7825c97de02a98258ed6b9e4c4dc3e79c73a89ab07008fa5d19a4d181ee
font_01_sfnt_off000076e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E7 10416 bytes
SHA-256: 2de1a93d78420c2800f0d7459c61498db7c6e7fc4dfaa9ff7dc2b1318a6c65d4

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