Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e5c7ace4b9b9a13…

MALICIOUS

PDF

38.1 KB Created: 2020-08-27 21:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cda948f044432ba9fcc544535b57ca52 SHA-1: 78f087dbfe7bc1fab0d92d3bf84d614d51933035 SHA-256: 6e5c7ace4b9b9a13d13d939e145a7ecb0e558513e81f7cfb510599fd457207dd
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains a URL that leads to a known malicious redirector. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous links and the ML classifier output strongly indicate malicious intent.

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=beauty+salon+flyers+templates+free
    • http://gusatub.sttammanywoodworkersguild.com/uploads/1/3/2/8/132816036/47e21.pdf
    • http://files.inspiringeducation.net/uploads/1/3/0/8/130874162/vovujudob_xesema_riwomoraw_lajesix.pdf
    • http://jorosef.anti-agingbyrjxjelly.com/uploads/1/3/2/3/132303354/8686563.pdf
    • http://files.khangnguyenart.com/uploads/1/3/0/8/130813413/nileniwukebifegopodo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5684/8282/files/96848157587.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/xuxipaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/0821/1619/files/riwakifetowusenevegaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8243/2160/files/gamecube_games_emulator.pdf
    • https://cdn.shopify.com/s/files/1/0465/5418/5878/files/biharwap._in_2019.pdf
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/1756146886.pdf
    • https://cdn.shopify.com/s/files/1/0438/6367/0939/files/best_app_for_annotation.pdf
    • https://cdn.shopify.com/s/files/1/0433/7798/3653/files/69201731837.pdf
    • https://cdn.shopify.com/s/files/1/0435/8340/6239/files/kabbalah_magic_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0569/7438/files/73334815982.pdf
    • https://cdn.shopify.com/s/files/1/0434/2362/9477/files/pideriluporixidiwawove.pdf
    • https://cdn.shopify.com/s/files/1/0439/1842/6267/files/suxabake.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056c1.bin
12ee8320f75a5f77ba4f21d834d4f858490f5071438313f7a0c0559580898fa0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56C1 5200 bytes
font_01_sfnt_off00006862.bin
932c6073a36dfd016aa9ec578682cc04a54fcd61ab48b3f8cd603a2487b4d63c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6862 10148 bytes

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