Malicious PDF — malware analysis report

Static analysis result for SHA-256 7090d5283ff3dcd1…

MALICIOUS

PDF

48.5 KB Created: 2020-08-30 10:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df5a6547562c1d5fd80d7621b51fc710 SHA-1: fd3ed009d66bf07daffb25c73d2dfea7d3e4db5c SHA-256: 7090d5283ff3dcd17c161eb0a666a5c2c0135bb7eba15f926120430062326a40
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body also contains this URL, suggesting an attempt to trick users into visiting a malicious site. The presence of numerous external PDF links, many pointing to Shopify, indicates a potential link farm or SEO manipulation tactic.

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=in+the+woods+pdf+tana+french
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3786/7680/files/ravi_belagere_o_manase_speech_audio.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/fapepuku.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56346524494.pdf
    • https://cdn.shopify.com/s/files/1/0461/6755/6259/files/wutijoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/6542/5570/files/48669744839.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/shield_wwe_images.pdf
    • https://cdn.shopify.com/s/files/1/0429/2889/8211/files/d_d_5e_inheritor_background.pdf
    • https://cdn.shopify.com/s/files/1/0435/3048/5912/files/diagnostic_microbiology_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0428/2351/6323/files/90534108683.pdf
    • https://cdn.shopify.com/s/files/1/0446/6245/6483/files/vidyasaarathi_scholarship_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/2684/9700/files/14443450989.pdf
    • https://cdn.shopify.com/s/files/1/0435/6449/9105/files/zogizos.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2871/files/associer_pages.pdf
    • https://cdn.shopify.com/s/files/1/0440/5736/2597/files/mathematical_analysis_2_canuto_tabacco.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_off00008006.bin
e59300d9dd64314ba65bf434356c3b953099aed6d6cf802171d322f9b617c897
pdf-font-stream PDF embedded font (sfnt) at offset 0x8006 5240 bytes
font_01_sfnt_off000091e7.bin
c66d2709f0c6b64a5f43c0c5f66a3e8e8505b6a231d9f49770d3fb86025b5638
pdf-font-stream PDF embedded font (sfnt) at offset 0x91E7 10300 bytes