Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae9358146b42323…

MALICIOUS

PDF

42.9 KB Created: 2020-08-23 01:22:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fff7d119517c3a9ab76010e6005bc92e SHA-1: c64c9fc133a20b5e1bce2ee091b8df8988eea432 SHA-256: 5ae9358146b423235675a3c855e8fedd417bc3b46bc38f0ccf49ea2973c666f6
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.cc/pify?keyword=website+design+quotation+template+doc'. The document body, though heavily obfuscated, contains text suggesting it is a 'website design quotation template', likely a lure. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to further malicious content.

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=website+design+quotation+template+doc
    • http://files.stjepanpepiskuric.com/uploads/1/3/0/7/130738548/2920330.pdf
    • http://files.southernmainewritingproject.org/uploads/1/3/0/7/130775830/zovaluvi.pdf
    • http://famap.swim-for-all.com/uploads/1/3/1/6/131637814/wuwud-wavolufasutu-liluminavojumin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0441/1280/6040/files/lisakukujekutosu.pdf
    • https://cdn.shopify.com/s/files/1/0440/8170/9206/files/47450429770.pdf
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/garth_brooks_discography_torrents.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/26329011456.pdf
    • https://cdn.shopify.com/s/files/1/0443/9041/6550/files/nitro_cloud_to_word_convert.pdf
    • https://cdn.shopify.com/s/files/1/0451/2638/5829/files/63021985855.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/who_causality_assessment_scale.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/44110733146.pdf
    • https://cdn.shopify.com/s/files/1/0463/4853/3917/files/3806074473.pdf
    • https://cdn.shopify.com/s/files/1/0437/7663/9134/files/jinja2_load_template_file.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/gevaratokoti.pdf
    • https://cdn.shopify.com/s/files/1/0433/5671/7224/files/2266788035.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_off000067f2.bin
210692dca11dc1b3e02ad50c561aea417f330117fc9060f410e6f01709623bca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67F2 5576 bytes
font_01_sfnt_off00007ad0.bin
6f3143fe4e82e4521b3969e93bd8bc8f28a9e1e93ca87be4340f0947abcfd3d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD0 10608 bytes

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