Malicious PDF — malware analysis report

Static analysis result for SHA-256 057981e7adf35e1a…

MALICIOUS

PDF

31.9 KB Created: 2020-08-31 01:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d1603154b2897a6059b812ba35a060a SHA-1: c0677fddc954bb25a04d0e0b73af3dd108ed24f7 SHA-256: 057981e7adf35e1aa74ad2abe34755e049b67f58615fe43c5f442887602bcffd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a redirector URL, indicating a likely phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the primary redirector URL and references to packaging templates, suggesting a lure. The ML classifier strongly flagged this PDF as malicious.

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.com/wix?keyword=packaging+templates+vector
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7157/8007/files/a_field_guide_for_everyday_mission.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6207/files/32290659645.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/zokabimijunetixopewigoxex.pdf
    • https://cdn.shopify.com/s/files/1/0461/4586/3843/files/alarmy_app_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/2289/0646/files/reported_speech_cambridge.pdf
    • https://cdn.shopify.com/s/files/1/0432/6768/6556/files/bean_bag_toss_rules.pdf
    • https://static.usrfiles.com/ugd/b8c837_107871a511b54473afb38051ef128d10.pdf
    • https://static.usrfiles.com/ugd/b8c837_d05f0c953a8b45b883990788c19958dd.pdf
    • https://cdn.shopify.com/s/files/1/0431/0790/9794/files/3556852469.pdf
    • https://cdn.shopify.com/s/files/1/0434/5351/3893/files/zoxituwozitunosifade.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_off00004111.bin
7aa7bc91a20ea6e903dda0159d3127b208fcada214e7424725cfbc267d8e9a0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4111 5380 bytes
font_01_sfnt_off0000534b.bin
4f995f9a931a17d34b19cc1c6561daeaba61ee12188b7c3c37e2a61aef21988c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x534B 9480 bytes

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