Malicious PDF — malware analysis report

Static analysis result for SHA-256 84ba954027a3ad24…

MALICIOUS

PDF

45.1 KB Created: 2020-09-01 20:21:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3c041d09b8d7a14862463e847eb37ce SHA-1: 8d54e7d147bc3233abd789c0797c9d1d7959490f SHA-256: 84ba954027a3ad240e26b862e8b745aefbc4ed3a3ec6ac13a6aca9267b0fa41b
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM indicating a link farm. One of these links, https://ttraff.cc/wix?keyword=professional+chauffeur+uniform, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting the primary purpose is to redirect the user to this malicious site. The ML classifier also strongly indicated maliciousness.

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=professional+chauffeur+uniform
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/zipanepikezovoxanalofuno.pdf
    • https://cdn.shopify.com/s/files/1/0437/6294/2101/files/distressor_uad_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/4050/6009/files/towuka.pdf
    • https://cdn.shopify.com/s/files/1/0431/1118/6585/files/convertir_archivos_a_word_gratis_en_espaol_en_linea.pdf
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/abbyy_finereader.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7911/files/area_and_volume_of_similar_shapes.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/67128978218.pdf
    • https://cdn.shopify.com/s/files/1/0433/9472/8103/files/lukagigojekujimazofon.pdf
    • https://cdn.shopify.com/s/files/1/0435/0997/3147/files/kedekowiwe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1596/1762/files/aisi_koi_gali_nahi_video.pdf
    • https://cdn.shopify.com/s/files/1/0437/4416/6049/files/40288176213.pdf
    • https://cdn.shopify.com/s/files/1/0462/5255/6437/files/wemofiresobo.pdf
    • https://cdn.shopify.com/s/files/1/0450/2369/0916/files/spoken_english_download_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/whatsapp_apk_mirror_2._12._194.pdf
    • https://cdn.shopify.com/s/files/1/0451/4293/3657/files/femokikaxilitugo.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/
    • https://cdn.shopify.com/s

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067b0.bin
920e20cc5901b5c3df4e75096ec16a06fa924fdb7b22d061480785735d25528a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67B0 4924 bytes
font_01_sfnt_off00007833.bin
2b712e204d404103157058c4331c7141e8937b8b514840c38d46150e71404c08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7833 9600 bytes
font_02_sfnt_off00009906.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9906 4324 bytes

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