Malicious PDF — malware analysis report

Static analysis result for SHA-256 c18efa25da683b60…

MALICIOUS

PDF

69.5 KB Created: 2020-08-05 16:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 472861c46b2735cf4045f121300e7f03 SHA-1: efa5d2d268982eb8f03896da83ef2518da680ad9 SHA-256: c18efa25da683b605004539ee2de1fc049f6431f9b9c3b0de4d983e42476ad2a
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, many of which point to a redirector service. The primary malicious link, 'https://ttraff.cc/pify?keyword=pdf+annotator+mac+os', is designed to trick users into downloading a malicious file by posing as a PDF annotator. The document body, though heavily obfuscated, contains this malicious URL, confirming the lure.

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.cc/pify?keyword=pdf+annotator+mac+os
    • http://lutunu.holycrossboys.com/uploads/1/3/1/3/131380845/1469613.pdf
    • http://files.heritagemantelsmn.com/uploads/1/3/2/7/132740541/xesivamido.pdf
    • http://files.wpbluebirdfestival.org/uploads/1/3/0/7/130739059/2cd3e26.pdf
    • http://files.metcalfe4pa.org/uploads/1/3/1/4/131408056/najuduxudabubofox.pdf
    • http://timevuze.tigercamp432.org/uploads/1/3/2/6/132681342/jeresi_zazupenuxixitat.pdf
    • https://cdn.shopify.com/s/files/1/0434/1117/7626/files/webm_to_mov.pdf
    • https://cdn.shopify.com/s/files/1/0433/8581/5205/files/43922716377.pdf
    • https://cdn.shopify.com/s/files/1/0431/5280/1943/files/dead_cells_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/rikofoxarariviwajasugizer.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/12035406071.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/dazumavokekoso.pdf
    • https://cdn.shopify.com/s/files/1/0433/3489/3721/files/97357344280.pdf
    • https://cdn.shopify.com/s/files/1/0432/9173/8277/files/nipepemikumazatemogorafaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/0811/5366/files/highway_78_accident_today_pa.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9215/files/79427738522.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/75938916840.pdf
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/udp_tracker_openbittorrent_com_80_announce.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0057/files/40713791751.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_off0000d4db.bin
37e18ce8669066cf8f4474a44bfd5f3f28bcc5076039ea2f43b273493351dafb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DB 5136 bytes
font_01_sfnt_off0000e63f.bin
7391344d14f0ef05af9e4c8d579654fda5e32ee8129b96bb8766a895593a232d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE63F 10152 bytes

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