Malicious PDF — malware analysis report

Static analysis result for SHA-256 e502d42d7616774d…

MALICIOUS

PDF

41.6 KB Created: 2020-08-18 22:16:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1c2cf8c4c3e07f9ee6e869a586bb428 SHA-1: d1c660ad076640187b7b70df2f6aecee93d772ae SHA-256: e502d42d7616774df0b765f11c0a5252ee01e496327601093ed0d8582dbaf778
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body contains garbled text and what appears to be a URL, suggesting a lure to external content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=cyrillic+on+android+tablet.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=cyrillic+on+android+tablet
    • http://files.truelight-photography.com/uploads/1/3/0/7/130776592/nivamajasutolowoj.pdf
    • http://masalas.razberrydazzles.com/uploads/1/3/1/0/131070872/tidimug.pdf
    • https://cdn.shopify.com/s/files/1/0434/8837/9032/files/mariah_carey_without_you_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4583/files/data_analysis_meaning_in_research.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/dire_maul_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/95328750168.pdf
    • https://cdn.shopify.com/s/files/1/0436/0408/2851/files/41711162383.pdf
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/30293876855.pdf
    • https://cdn.shopify.com/s/files/1/0434/5479/1832/files/anyo_ng_akademikong_pagsulat.pdf
    • https://cdn.shopify.com/s/files/1/0435/6613/7507/files/26520254926.pdf
    • https://cdn.shopify.com/s/files/1/0436/7004/4825/files/ableitungsregeln_mit_beispielen.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/class_12_biology_project_on_diabetes.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4436/files/cen-_tech_multimeter_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/84864600996.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6774/files/circulatory_system_of_frog.pdf
    • https://cdn.shopify.com/s/files/1/0440/2679/0053/files/angeles_y_demonios_google_drive.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/ruwome.pdf
    • https://forums.androidcentral.com/showthread.php?t=196189&s=d880fcecc64f9a3cbbc80defbfe1623c
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://forums.androidcentral.com/showthread.php?t=196189&s=d880fcecc64f9a3cbbc80defbfe1623c
    • 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_off0000667e.bin
08651fefeb39668c729928565601df019d0543a3a295792804a2cd1c96cad0c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x667E 4904 bytes
font_01_sfnt_off0000772b.bin
32141abb2b205995aad03465b829e49b95657fc1123df36cf5eab7ddaec0c399
pdf-font-stream PDF embedded font (sfnt) at offset 0x772B 10060 bytes