Malicious PDF — malware analysis report

Static analysis result for SHA-256 1707076190f875c4…

MALICIOUS

PDF

42.8 KB Created: 2020-08-29 23:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51b134b3847cb807add2d3e43eadcee8 SHA-1: d2648180564549cc511f33e72f7481982e4c8ef2 SHA-256: 1707076190f875c48dee19da8b19238b4395d3d4fc25107a1b65b302c8391cf4
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain the URL for the redirector, suggesting a lure to external content. The ML classifier strongly indicates maliciousness, and the PDF structure is consistent with SEO link farm abuse.

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.ru/wix?keyword=weather+and+seasons+worksheets+esl
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/52b593_cdab9aff833348f5bdc2b42fc115abc4.pdf
    • https://static.usrfiles.com/ugd/b8c837_6741f90b353c4d09a2050c093fafc4bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_96bb1220464242ba9e414e2cc5540424.pdf
    • https://static.usrfiles.com/ugd/b8c837_0bd9456a259943cbbcab33a6563a9e1e.pdf
    • https://static.usrfiles.com/ugd/913720_6de5cdeb541847adad7aa95a51af9820.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/manolukafopero.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5207/files/76263583396.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/wapajalizijamofolov.pdf
    • https://cdn.shopify.com/s/files/1/0428/6503/3383/files/work_breakdown_structure_sample.pdf
    • https://cdn.shopify.com/s/files/1/0430/9165/6864/files/diwoba.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/tujanarubolabixusetotux.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6232/files/nimoga.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6835/files/53033683406.pdf
    • https://static.usrfiles.com/ugd/c1615c_7d52c49c569e475ab3bdc629446f65cf.pdf
    • https://static.usrfiles.com/ugd/353d00_78f2705a7a7941e38b484577cd143ba1.pdf
    • https://static.usrfiles.com/ugd/b8c837_f9041e3a4ecf47f2bb1f5f26774a73c0.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cfb.bin
4376b66d472942044cf9e425c0602337601d454bf31b164e2bce562a0750def2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFB 4820 bytes
font_01_sfnt_off00006d6a.bin
6e44f5e5a6735e0aec8eef9ca894678fa2d147169aece0df0668a0115c676b53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6A 10120 bytes
font_02_sfnt_off0000900f.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x900F 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.