Malicious PDF — malware analysis report

Static analysis result for SHA-256 e150fd4e2defe275…

MALICIOUS

PDF

40.3 KB Created: 2020-08-24 10:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91c54c9ebc8b0d868e954c5edeac1825 SHA-1: 5200f61af9531874283f7cef157f94d4eb8410c2 SHA-256: e150fd4e2defe275d67a1cd960dd227871fe1a90f5e5d4d399bd4e4ac1cc2481
120 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 a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=formulir+amalgamasi+bpjs+ketenagakerjaan'. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware delivery. The document body, though heavily obfuscated, contains text related to 'Formulir amalgamasi bpjs ketenagakerjaan' and references wkhtmltopdf, indicating it's a crafted document intended to appear legitimate.

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=formulir+amalgamasi+bpjs+ketenagakerjaan
    • http://xezif.thetapstudioak.com/uploads/1/3/1/4/131437987/ruxawugof-nesadatutelewa-kasibo-nerezazogozuji.pdf
    • https://cdn.shopify.com/s/files/1/0431/3956/3686/files/vefej.pdf
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/29764167727.pdf
    • https://cdn.shopify.com/s/files/1/0438/4374/7990/files/kabifotumozatokesaboji.pdf
    • https://cdn.shopify.com/s/files/1/0437/6163/1384/files/krishna_yajurveda_aranyakam_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0436/2492/3298/files/fesiliwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5897/8207/files/xiveler.pdf
    • https://cdn.shopify.com/s/files/1/0433/7221/6483/files/moviebox_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0430/8926/4794/files/punctuation_worksheets_3rd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3507/files/jipujudisabovube.pdf
    • https://cdn.shopify.com/s/files/1/0429/5737/3589/files/74824140064.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f62.bin
099839564174ceea9799a27576995dfcea2c39c1dadb0c6b9a97ebf2f8901709		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F62 5376 bytes
font_01_sfnt_off0000719b.bin
607cabd059548824ba66507b1a1d50f325b25cd31904f81fdf060085305fd571		 pdf-font-stream PDF embedded font (sfnt) at offset 0x719B 10212 bytes

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