Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d0bc911804feea5…

MALICIOUS

PDF

45.1 KB Created: 2020-08-26 00:22:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7983b9a75ccb525ad401fcbfd95f464 SHA-1: 5ddabb6183d46e00cfd6807f6d2d1a5bea9d4ee3 SHA-256: 5d0bc911804feea5b3981a0334c020ff4f34b38e38d13fa2d884e3e61d22fc9a
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with at least one identified as a malicious redirector. The document body, though partially corrupted, contains text related to sociological thought and includes the malicious URL. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent, likely to lead users to phishing sites or download further malware.

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.cc/pify?keyword=as+etapas+do+pensamento+sociol%25C3%25B3gico
    • http://mamiga.baldyviewdrivingschool.com/uploads/1/3/2/3/132302782/pajimisekuso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6686/7364/files/addition_and_subtraction_rules_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/zuditi.pdf
    • https://cdn.shopify.com/s/files/1/0438/1173/3664/files/sofevajilegirogaparuwimo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7988/files/deep_six_lateral_rotators.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57148414383.pdf
    • https://cdn.shopify.com/s/files/1/0431/7308/5341/files/palapanisa.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0358/files/vafim.pdf
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/john_deere_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0433/8227/6250/files/66895220010.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e7e.bin
44c90112311a4d27a6a5bf9e503866957f56a54e864997bb479acad47b4a85ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7E 5420 bytes
font_01_sfnt_off00008097.bin
6276a0bf8eee3c6375df24b8f9b9df1b3f9c1d847e78f4ed5ddb7812a2986762
pdf-font-stream PDF embedded font (sfnt) at offset 0x8097 12288 bytes