Malicious PDF — malware analysis report

Static analysis result for SHA-256 038275e7644aca19…

MALICIOUS

PDF

55.7 KB Created: 2020-08-31 08:20:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b0c61f2d16d54732cdd31d336735a21 SHA-1: d632f2b467a1fc356d6608a79dad4a8708e8157c SHA-256: 038275e7644aca19071bf892acfb60717bfeaac209a73b088a1e6daaabaf7606
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Rca universal remote automatic code finder' and a URL that aligns with the malicious redirector heuristic. The presence of numerous external PDF links further suggests a link farm or redirection scheme.

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/wix?keyword=rca+universal+remote+automatic+code+finder
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/47b1e8_8a1663d6c7344cbeb58b94457a7dbc0c.pdf
    • https://static.usrfiles.com/ugd/19ce5d_67ba901cc85340e6b6a5c4dc485980c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf0ffd54d3244c63897141950abf5bc3.pdf
    • https://static.usrfiles.com/ugd/b8c837_efab7b681d9a43dfa11e5b6b10af5f43.pdf
    • https://static.usrfiles.com/ugd/d162e3_e43df8265fea4cc58270c3571f44cd84.pdf
    • https://cdn.shopify.com/s/files/1/0437/7490/2423/files/wizozujovofejizu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/13628527552.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8949/files/31192976482.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/89936102053.pdf
    • https://cdn.shopify.com/s/files/1/0431/2127/9138/files/sopozirovug.pdf
    • https://cdn.shopify.com/s/files/1/0430/4715/7914/files/pediatric_anthropometric_measurements.pdf
    • https://cdn.shopify.com/s/files/1/0429/0258/5500/files/don_juan_tenorio_cervantes_virtual.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_off000091e7.bin
fd48b4137b5144be820013bd4d0e3daf257e7f4227b969cec296317194358c2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x91E7 5232 bytes
font_01_sfnt_off0000a3a3.bin
fe6ab750ebbc21d868fd94e3b9974d39f7566dad8784f0d26cc0bcc94253f738
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3A3 14896 bytes