Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2936b75059e0130…

MALICIOUS

PDF

47.7 KB Created: 2020-10-21 06:33:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c4be986b36f3b3d488f1eb4281921f36 SHA-1: 438bdc0df154204a727676ec3b180b87d6bcfe10 SHA-256: e2936b75059e013009db66466dbdab05ecd4139b7615beaef0d621e2613322cb
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains numerous embedded links. One prominent link directs to `https://cctraff.ru/wb?keyword=velocidad%20de%20procesamiento%20pdf`, which is identified as a known malicious redirector. The document also exhibits characteristics of a PDF link farm, with many external links pointing to PDF files, suggesting an attempt to manipulate search engine results or distribute further malicious content.

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://cctraff.ru/wb?keyword=velocidad%20de%20procesamiento%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380530/normal_5f8f2f4907196.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379842/normal_5f8f591516fdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f89efae5aa0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373522/normal_5f8f79834304b.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/60feacb278.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/6277340.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/tikeladosobixa.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7360136.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/4485904.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/misubamikuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5ae7fc94-9a81-4e19-b2e9-091d4c69ef39/gubamij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6791/5936/files/zobuxezudefab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1910/7993/files/pacific_hydraulic_press_brake_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/0321/5778/files/scatter_plots_worksheets_8th_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0870/5187/files/n_track_studio_pro_multitrack_1.1.9_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0444/6878/files/kurirekirawix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8935/4142/files/98264689523.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6985/2833/files/chuunibyou_take_on_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2188/8409/files/intermediate_english_textbooks_telangana.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D47 5052 bytes
SHA-256: 855ea035cdcde181edd23d4a5404a0aa3b96b0fddc5dea156d84872952a4f44f
font_01_sfnt_off00007e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4B 11024 bytes
SHA-256: d28e5b1a5ff2e167ae46ed63e379bf62e285fc1cfd08e6cf5891c447990843df
font_02_sfnt_off0000a20f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA20F 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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