Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0c8504d9baafd6…

MALICIOUS

PDF

42.5 KB Created: 2020-08-09 20:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f83391b36caaf8992a48918c0f67219c SHA-1: 579dfdc1c8f59080cf7d7620e62afd1fd6f775e9 SHA-256: fd0c8504d9baafd602ab2766fb6370d174c27d186d65762dfa7df83d7fc05d0d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=list+of+words+with+silent+letters+in+english+pdf'. Another critical heuristic indicated a link farm structure with 18 external PDF links, many hosted on cdn.shopify.com. The document body contains text related to the embedded links, suggesting a lure.

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/pify?keyword=list+of+words+with+silent+letters+in+english+pdf
    • http://ridiripag.carrielwells.com/uploads/1/3/0/8/130874218/repok.pdf
    • http://files.ocvbc.com/uploads/1/3/1/4/131437733/vokezulubaxogib_fenedo_surepagamapif_rolezeromirib.pdf
    • http://files.rickyfrank.com/uploads/1/3/1/3/131398102/somupokaluredexuv.pdf
    • http://files.dianahubbell.com/uploads/1/3/2/6/132683154/povijetul-bitatizepenawov-xubupabixifo.pdf
    • http://files.healthylivingtc.com/uploads/1/3/0/7/130775361/da9526b7c.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/noviwuvado.pdf
    • https://cdn.shopify.com/s/files/1/0432/0487/0305/files/vizajumufaxominoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/7509/9041/files/fizula.pdf
    • https://cdn.shopify.com/s/files/1/0429/9368/0547/files/ap_grama_sachivalayam_results.pdf
    • https://cdn.shopify.com/s/files/1/0440/3937/2965/files/tefukigazumowojabarewuris.pdf
    • https://cdn.shopify.com/s/files/1/0432/8819/9332/files/zeganilenivijuvugekazo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3102/0198/files/82462265784.pdf
    • https://cdn.shopify.com/s/files/1/0435/2802/8312/files/zujujaguvuluwifagabev.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/pitewo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/tozuvo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9412/1379/files/30714167215.pdf
    • https://cdn.shopify.com/s/files/1/0433/1683/8558/files/75880592993.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/xiaomi_air_purifier_2s_user_manual.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_off000067fa.bin
2aedcdced342a4b6e4c608a3bebf0630dd4e1d3ccaac9ef1b9a7f489b0dbb542		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67FA 5124 bytes
font_01_sfnt_off00007981.bin
842d8008c1c1c4c641b30fb0a77b55adbd7fbe9c4c7f6bc1303a3eadb72c67f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7981 10120 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.