Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b11ca3236a788c…

MALICIOUS

PDF

49.1 KB Created: 2020-08-13 22:40:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1717ea3678f2fc4ba80b3b4571a24d4c SHA-1: df2cf4da60858e4424cbc45b11fbc24d92dbf861 SHA-256: 79b11ca3236a788ca4df1a371e4def40f8b1add25bba6394b5610f80b0d4e721
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-Override

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm pointing to a malicious redirector. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=amla+ka+sita+song'. While the document body contains garbled text and metadata, the presence of numerous external links, including one to a known redirector, strongly suggests a phishing or redirection attack. No scripts were extracted, limiting further analysis of the payload.

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/pify?keyword=amla+ka+sita+song
    • http://lusis.spcym.org/uploads/1/3/1/3/131379326/2349132.pdf
    • http://files.sinergysports.com/uploads/1/3/0/7/130775126/zurobupazap_rusanarupofuz_bolefa_sasoj.pdf
    • http://files.caroldmarsh.com/uploads/1/3/1/4/131482886/kibojezur_widavodukexo_vazulaxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/33103509679.pdf
    • https://cdn.shopify.com/s/files/1/0430/1016/2837/files/campus_design_case_study.pdf
    • https://cdn.shopify.com/s/files/1/0434/7920/4006/files/animation_creation_app_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0436/4910/6080/files/mumogojezofafo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/zobami.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/94228939163.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/viborovikumowenaben.pdf
    • https://cdn.shopify.com/s/files/1/0436/1617/4237/files/40567963532.pdf
    • https://cdn.shopify.com/s/files/1/0440/4294/4677/files/5662859674.pdf
    • https://cdn.shopify.com/s/files/1/0434/9411/3446/files/52574366497.pdf
    • https://cdn.shopify.com/s/files/1/0436/4464/9630/files/81573419011.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fc0.bin
d8bfb92983ca528d03e73ceae246e093e4099dfffbfb4843f7418571dfd12782		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC0 4632 bytes
font_01_sfnt_off00006f5a.bin
04cd7c3886c1aa47a5bc56d10095771e2cf2e40391a834e6e765bacf1bcc0d1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5A 14096 bytes
font_02_sfnt_off00009bee.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BEE 4324 bytes
font_03_sfnt_off0000a9ef.bin
3bda73875703d0e9c5b9d5bbf973aff04c6dc79948069c61a31856c5988536cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9EF 2788 bytes

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