Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a330f480ea8bec4…

MALICIOUS

PDF

40.8 KB Created: 2020-09-17 08:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d99f06357dcc0b8d8694f34d640eb03a SHA-1: b018eeba664003811abe8785db16ddcf130d0436 SHA-256: 5a330f480ea8bec46a8cc65fe97ab025a5460345d9b803e852408636d0dc73bf
154 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that are part of a link farm, suggesting an attempt to drive traffic to malicious sites. The primary malicious URL identified is https://ttraff.club/wix?keyword=taylor+marie+prendergast, which is likely used for phishing or malware distribution.

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.club/wix?keyword=taylor+marie+prendergast
    • http://gorosig.southerncww.com/uploads/1/3/2/6/132695742/puwiwowevezogor_nituvedobexas_xowapupip_nufijomawi.pdf
    • http://files.kashmirweavers.org/uploads/1/3/1/8/131871390/7e47569.pdf
    • http://files.sedevcharging.co.uk/uploads/1/3/1/4/131437513/gobifajefebe.pdf
    • http://files.phenomenologyinvenice.com/uploads/1/3/2/8/132815004/nojekuxegipog.pdf
    • http://files.colegioinglesprimaria.com/uploads/1/3/1/4/131409305/gisatogiramidix_xamosatigop_lanowa_xudil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f2f2c6a9-3929-4519-a5ba-978ae50cdd55.filesusr.com/ugd/c638b7_8ac8b7e427b14098bef31bf8cb078d99.pdf?index=true
    • https://04538a82-adf7-4aad-953a-d0248a0ab8d8.filesusr.com/ugd/89441e_d8c2ecb468fc4b56b862e4f1e8dbea2e.pdf?index=true
    • https://51a89ff5-139b-4a44-9e93-7b68b11b599f.filesusr.com/ugd/24d943_775f1b9c10b94110911c7f3f5ed9ab59.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0461/6814/6072/files/athbhutha_dweepu_malayalam_movie_songs.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/30042516428.pdf
    • https://86db7f38-6c29-4fce-85bf-58bce509b503.filesusr.com/ugd/6f9b04_2cafa685013f44e3bf1d54b56bc4fcae.pdf?index=true
    • https://6e5e5c27-170d-46d9-b2bf-19d14dc436e0.filesusr.com/ugd/3d0627_05acd3d37ab14c1cb52bf9449a296545.pdf?index=true
    • https://861cebd8-3222-481e-bae9-4862db1f095d.filesusr.com/ugd/72b0e7_cc83fd4dcd854ff79fbbfc92add7d3f1.pdf?index=true
    • https://23a12f46-f7d0-4a90-82b0-fd97341f11ec.filesusr.com/ugd/1e557c_a8f6afa2e71c41b2a4c9067fbb983fcd.pdf?index=true
    • https://212da87d-e7ac-4bf1-bc3b-9465c3f7a1de.filesusr.com/ugd/a31856_c307139f55d9489497ce7f3575ff9963.pdf?index=true
    • 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_off00006056.bin
3a868e840c614aa1a83a91d4bf651c6e6b841830e109aea65e0e13e9feb18804		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6056 5328 bytes
font_01_sfnt_off0000726a.bin
1bc8e19bf966f98156a10c6676cc40754b71c1655e52d87c427c5761913aae60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x726A 10672 bytes

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