Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c2a10a5710a0434…

MALICIOUS

PDF

62.3 KB Created: 2020-08-11 07:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0aeaf3bb201b3c7041cee62111d6dce SHA-1: 39d433ce2f0c532ede4940829aaa745442117811 SHA-256: 4c2a10a5710a0434ae5eed3b2bf9893aa6ced923b4e9cdef644c49760724902c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=star+wars+essential+reader+s+companion+pdf'. Another critical heuristic indicates a PDF link farm, suggesting SEO spam or a distribution mechanism for malicious content. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, limiting the analysis of direct payload execution.

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.ru/pify?keyword=star+wars+essential+reader+s+companion+pdf
    • http://files.captureourlife.com/uploads/1/3/0/8/130874683/gasamegevepato.pdf
    • http://bofubifi.animalcarezone.org/uploads/1/3/0/7/130739415/e2dbf.pdf
    • http://files.reggieschivejazzcamp.com/uploads/1/3/0/9/130969809/67650ff.pdf
    • https://cdn.shopify.com/s/files/1/0433/8063/7861/files/zejuwudixo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6179/files/code_academy_python.pdf
    • https://cdn.shopify.com/s/files/1/0432/6991/4782/files/common_core_anchor_standards.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9424/files/95720692968.pdf
    • https://cdn.shopify.com/s/files/1/0432/0490/3067/files/sovebuloluwusetatupalobuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5687/files/30666219267.pdf
    • https://cdn.shopify.com/s/files/1/0432/2502/2621/files/36243712855.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6880/files/3423929472.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/vanilla_wow_fishing_and_cooking_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/6099/9830/files/gukupikoxil.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/49217554640.pdf
    • https://cdn.shopify.com/s/files/1/0432/4491/2808/files/90165208780.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/kedoxuloporasutajiwuxomaj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009cc9.bin
bf373b276ec250a93b172f2b9b357053ceaf15f1e2c7b106b43ff19cef71411d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CC9 5496 bytes
font_01_sfnt_off0000af6c.bin
f7c162c5ee0261d95d8a09987f871e961893bbc0eb25494509977e9642d4c71d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF6C 10988 bytes
font_02_sfnt_off0000d3d2.bin
fd8bcd6c9d5653f5ca42e7a0da8c37bb11293382d085f187bfc5f0104eb230c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D2 16832 bytes

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