Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e6c163750d53da4…

MALICIOUS

PDF

44.8 KB Created: 2020-10-31 09:39:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2e9d347fa03e789691a084671fe1654 SHA-1: 1495dd60be887e62481f6593524510f85eadba11 SHA-256: 6e6c163750d53da48c6fd962926d8e5d2cbccdcdf510aff7aba2abdf0ec5bd28
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector heuristic, suggesting the primary purpose is to direct users to potentially harmful external sites.

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.com/123?keyword=use+regard+or+regards
    • https://nixejovebomir.weebly.com/uploads/1/3/1/3/131380485/megowew.pdf
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/foxisewowixubetaja.pdf
    • https://cdn-cms.f-static.net/uploads/4374545/normal_5f8a0dbed77bd.pdf
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f86f5071fbd5.pdf
    • https://cdn-cms.f-static.net/uploads/4422137/normal_5f9b30ff67255.pdf
    • https://cdn-cms.f-static.net/uploads/4373281/normal_5f958316321b6.pdf
    • https://cdn-cms.f-static.net/uploads/4406170/normal_5f99a1e4ef9cc.pdf
    • https://cdn-cms.f-static.net/uploads/4369313/normal_5f931ce17d2e8.pdf
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f87664c4cd04.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/093e2281-4ae3-4d2b-bfd6-067a37f5a722/15213109751.pdf
    • https://cdn.shopify.com/s/files/1/0493/4280/8223/files/texas_landscape_irrigation_training_and_reference_manual.pdf
    • https://cdn.shopify.com/s/files/1/0498/3577/0023/files/wow_bfa_pvp_class_guide.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_off0000715f.bin
995e6c5c34aae25e9ca9afab312232ec8282142a58f52f20a1e365213923579f
pdf-font-stream PDF embedded font (sfnt) at offset 0x715F 4952 bytes
font_01_sfnt_off00008243.bin
06724b983fdd5337ba103d9f60c067677054e8519fa131a1c6796a32a98f7515
pdf-font-stream PDF embedded font (sfnt) at offset 0x8243 10596 bytes