Malicious PDF — malware analysis report

Static analysis result for SHA-256 105daf2260cbae0f…

MALICIOUS

PDF

70.1 KB Created: 2020-09-19 04:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4c4db518b417c1808f4b07cb6020a14 SHA-1: eca6e0e84b5c437e79ea324b1879ae70b38e0f69 SHA-256: 105daf2260cbae0fa6c66237b815933bfb6dbc4c3dba6bd26003717094b97da4
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, suggesting an attempt to direct users to a harmful site. The embedded URL 'https://ttraff.link/wix?keyword=temperate+grassland+plant+characteristics' is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and heuristics indicate malicious intent, likely to facilitate initial access via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.link/wix?keyword=temperate+grassland+plant+characteristics
    • http://badag.bainbridgesaddleclub.net/uploads/1/3/1/8/131856257/e3a628b5dd7aa4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/5267/6773/files/beps_action_1_final_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/5491/4981/files/android_ndk_log_to_file.pdf
    • https://cdn.shopify.com/s/files/1/0431/1256/2849/files/lejerejugigeza.pdf
    • https://cdn.shopify.com/s/files/1/0434/5449/6935/files/nisapanelofojawelutupab.pdf
    • https://cdn.shopify.com/s/files/1/0454/9004/5080/files/merge_sort_algorithm_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0461/1476/7012/files/cracking_the_pm_interview_how_to_lan.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5706/files/6629218653.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3630/files/arcangel_me_prefieres_a_mi_modelo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc40.bin
62b4a5fe8a2fded1c5e62eb531cd7c4eccb1efa16a37a120f5f6e2150fa7ebc5
pdf-font-stream PDF embedded font (sfnt) at offset 0xBC40 5112 bytes
font_01_sfnt_off0000cd65.bin
bb9497412ec19d0b5dba1dcc86f504f0d3111420f455b0e03988c8df21d39a9b
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD65 15344 bytes
font_02_sfnt_off0000fd72.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD72 4324 bytes