Malicious PDF — malware analysis report

Static analysis result for SHA-256 f29ee025d5325c5c…

MALICIOUS

PDF

81.0 KB Created: 2020-09-18 18:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbd13975d189074950f7d02a605f8f79 SHA-1: 2c7d76f7fd7f6c4aaec4d95489b004dc2cbb3a73 SHA-256: f29ee025d5325c5c440b06d69b4dcac9ed0bec8c9b739b18a2b0374dbb7f5aec
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged as malicious by a machine learning classifier and contains a significant number of external links, many of which point to redirector infrastructure. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.link/wix?keyword=the+lost+heir+romance+guide'. The document body, though partially corrupted, contains this same URL, suggesting it is the primary lure. The presence of a link farm indicates an attempt to distribute malicious content or conduct phishing operations.

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.link/wix?keyword=the+lost+heir+romance+guide
    • http://palag.chicagosummeropera.com/uploads/1/3/1/0/131070152/kegatuditamaga.pdf
    • http://batudosi.acasaelmundo.com/uploads/1/3/1/6/131607163/5868590.pdf
    • http://pujub.kcnmi.org/uploads/1/3/2/7/132710621/6378050.pdf
    • http://wisiwepu.planningforgrowthnorthsk.com/uploads/1/3/0/9/130969656/8488902.pdf
    • https://02f0c510-6d93-4755-830a-6d04eee9e10b.filesusr.com/ugd/faa7ef_b93d2d82592c4629a114d01899be0f4a.pdf?index=true
    • https://af14693a-4c03-47bf-b049-d47878032811.filesusr.com/ugd/5a4aad_72308bce277d4fbcb0c737ee497f46ae.pdf?index=true
    • https://5b203224-862d-498e-9836-b541611f65ab.filesusr.com/ugd/0511f5_df3dd7ee120d4e848d373518f947162b.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0440/1355/1781/files/4393409719.pdf
    • https://cdn.shopify.com/s/files/1/0434/9463/7734/files/gogogusamoxokafa.pdf
    • https://cdn.shopify.com/s/files/1/0433/2525/9944/files/zigunijufifosimamud.pdf
    • https://cdn.shopify.com/s/files/1/0427/6885/9303/files/bonofowofuwurubipa.pdf
    • https://cdn.shopify.com/s/files/1/0465/8128/5031/files/beintehaa_colors_serial_song.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/calendario_escolar_zaragoza_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/5317/7237/files/dosolof.pdf
    • https://cdn.shopify.com/s/files/1/0434/2582/4929/files/229741298.pdf
    • https://cdn.shopify.com/s/files/1/0434/7743/4525/files/19248294741.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffed.bin
4ede55f7441a2b0d8e8b09dec3c9103169191247d1e3b92ff8cefb0dcb0d0d85		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFED 5300 bytes
font_01_sfnt_off000111ba.bin
a24990ad55746dc25f316f2374e4f079caadeacc9e79ad04fe660b7bac66ca71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111BA 10984 bytes

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