Malicious PDF — malware analysis report

Static analysis result for SHA-256 64296c4e3ac308bd…

MALICIOUS

PDF

40.1 KB Created: 2020-08-30 18:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59365bd204f1c2a6d6fb069a15516a06 SHA-1: 47b046214eb4fb047f6045b060068d1d961e7e0f SHA-256: 64296c4e3ac308bdc8b0bb9ff1d77d53c649c15ba339cc1d8aa6675006689b2d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded links, many pointing to external PDF files hosted on Shopify, which is indicative of a link farm or SEO manipulation tactic. One of the primary links directs to a known malicious redirector, ttraff.cc, suggesting an attempt to lead the user to malicious content. The ML classifier also 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.cc/wix?keyword=uci+list+of+clubs
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7825/4745/files/arthritis_research_council_back_pain.pdf
    • https://cdn.shopify.com/s/files/1/0432/3190/3902/files/2879677738.pdf
    • https://cdn.shopify.com/s/files/1/0437/7260/8663/files/meaning_of_variables_in_research.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/2017_m_series_vizio.pdf
    • https://cdn.shopify.com/s/files/1/0449/4236/0744/files/google_sheets_count_characters_in_column.pdf
    • https://static.usrfiles.com/ugd/b6edda_ae280728aa5a4bd5a8ff92a33624a6dd.pdf
    • https://cdn.shopify.com/s/files/1/0432/1706/0007/files/intellij_code_inspection_report.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/mogoxetetunazobivi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5667/7543/files/mean_median_and_mode_of_grouped_data.pdf
    • https://cdn.shopify.com/s/files/1/0435/4274/1143/files/canada_food_guide_2020_french.pdf
    • https://cdn.shopify.com/s/files/1/0431/3396/0341/files/58812171910.pdf
    • https://cdn.shopify.com/s/files/1/0434/1425/7815/files/fonodudik.pdf
    • https://cdn.shopify.com/s/files/1/0433/1628/1512/files/truestormsfo4-_nukaworld-_fh-_compat._esp.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_off000061a3.bin
d89be2fcead390550e9d32dc033e9d856724870cdefbeed2bab2a5400d0d7c9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x61A3 4700 bytes
font_01_sfnt_off000071b5.bin
6a34dbc92990c3714066f05dc312b9ddcc02c51827586673c95653e797e6868a
pdf-font-stream PDF embedded font (sfnt) at offset 0x71B5 10148 bytes