Malicious PDF — malware analysis report

Static analysis result for SHA-256 e98cf28fa3ecb7c9…

MALICIOUS

PDF

49.1 KB Created: 2020-08-30 04:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccc7f0ea506afcee039edae67a7ad18e SHA-1: 2493bc05f265d304a2aa9c66a46837802aa28b4f SHA-256: e98cf28fa3ecb7c9b566bb4706fc2421942a31c22121d82741fa9380827173a9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector (ttraff.cc). The document body, though heavily obfuscated, also contains this URL, suggesting a lure to external malicious content. The presence of a PDF link farm heuristic further supports the malicious intent of distributing links.

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=exercise+before+or+after+breakfast
    • https://cdn.shopify.com/s/files/1/0433/1061/2635/files/rezuzitosad.pdf
    • https://cdn.shopify.com/s/files/1/0432/4737/0402/files/friendship_status_videos_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0786/8060/files/chainsmokers_closer_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4663/files/pevalumegigujul.pdf
    • https://cdn.shopify.com/s/files/1/0433/9168/0673/files/meaning_of_capital_market_reforms.pdf
    • https://cdn.shopify.com/s/files/1/0446/7671/0563/files/convert_seconds_to_years.pdf
    • https://cdn.shopify.com/s/files/1/0431/5774/9917/files/parestesia_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8383/files/16411109095.pdf
    • https://cdn.shopify.com/s/files/1/0435/5152/2977/files/mosaicos_colorea_por_numeros_editorial_gali.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3996/files/mugukep.pdf
    • https://cdn.shopify.com/s/files/1/0435/6282/7935/files/nujakex.pdf
    • https://cdn.shopify.com/s/files/1/0435/4896/7061/files/allis_chalmers_d17_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6335/files/ocarina_of_time_japanese.pdf
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/blank_fax_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/1129/0782/files/zajiwofogirepuvebujo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6533/4165/files/28775937443.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083c1.bin
cbaba89c9ba3e7f86a971899036cde9ae0770cfc3f5fbb7c84e6aa372721c136
pdf-font-stream PDF embedded font (sfnt) at offset 0x83C1 5072 bytes
font_01_sfnt_off00009513.bin
e426728d4905fe73b9fd1d60a942e9834f61d34442f2936a0ff1a52fe7b2e7d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x9513 9964 bytes