Malicious PDF — malware analysis report

Static analysis result for SHA-256 09bef3e005a3b697…

MALICIOUS

PDF

60.4 KB Created: 2020-08-30 03:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a30677b5ccbb0bd6fc7b569776d5bdbe SHA-1: 714b1ddc456cd125495907fee21812567db64aa2 SHA-256: 09bef3e005a3b697fabee3cfd9906e6dd7ec6c1da15b074f2d81e9af5211292f
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the same URL and a keyword related to medical information, suggesting a lure to entice clicks. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=normal+level+of+pus+cells+in+urine+during+pregnancy
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6772/7269/files/jspdf_html_to_angular.pdf
    • https://cdn.shopify.com/s/files/1/0433/8535/6449/files/22871345836.pdf
    • https://cdn.shopify.com/s/files/1/0434/3755/5868/files/generation_z_age_range.pdf
    • https://cdn.shopify.com/s/files/1/0432/1217/7572/files/type_de_carrosserie_automobile.pdf
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/rovobaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/5329/2440/files/two_voices_one_song.pdf
    • https://cdn.shopify.com/s/files/1/0438/8664/1304/files/ladikalefuxilejuwavexitox.pdf
    • https://cdn.shopify.com/s/files/1/0448/5578/7681/files/uptet_2018_answer_key_primary.pdf
    • https://cdn.shopify.com/s/files/1/0431/0797/5335/files/55063513343.pdf
    • https://cdn.shopify.com/s/files/1/0434/6036/2392/files/4841594295.pdf
    • https://cdn.shopify.com/s/files/1/0437/2224/4264/files/47409635372.pdf
    • https://cdn.shopify.com/s/files/1/0437/8745/2576/files/15353115402.pdf
    • https://cdn.shopify.com/s/files/1/0432/3206/7739/files/rosutelaru.pdf
    • https://cdn.shopify.com/s/files/1/0439/5096/4904/files/putofikuvikema.pdf
    • https://static.usrfiles.com/ugd/b65acf_5797c4bcd02745d39ff408e4e97511a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b45f645a8f446e1a05ee991c4a83db5.pdf
    • https://static.usrfiles.com/ugd/2ac701_fa2eb778cee44e7199b170cb8b0671f0.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_off0000adce.bin
e61d78071d273a8752701934874b87c02be1d8e1ebcab4edbd87bbda6dcf3e8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADCE 5608 bytes
font_01_sfnt_off0000c0d6.bin
32c44f2aecf9bfe50b4c5a21a205d4e88aabd32507dd64fd4f0b0e497d4bd59d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D6 10244 bytes

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