Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d98df749b3114a8…

MALICIOUS

PDF

58.6 KB Created: 2020-08-09 23:19:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 366d0627305abefaa6bf677f4865751a SHA-1: 848c10470622699542a0a1ae489de9a97f2fd671 SHA-256: 0d98df749b3114a831d2833fa7a7a63a927f9f21339de4357ddb6e0647103e70
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for academic content. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=article+defini+ou+indefini+exercices+pdf
    • http://xosewa.dgofire.com/uploads/1/3/1/4/131406202/puzumufevus_boveje_mapil_kogileteve.pdf
    • http://puduz.rainbowschoolmn.org/uploads/1/3/2/6/132682646/7128112.pdf
    • http://files.damiancowell.com/uploads/1/3/1/4/131454521/nunukiwenodufu_bedetixamezufor.pdf
    • http://files.schoolmastermiller.com/uploads/1/3/0/9/130969435/xarefipoxumofovesu.pdf
    • http://files.24-7dancecompany.com/uploads/1/3/0/7/130740563/ribega.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/winmeen_monthly_current_affairs_april_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/2589/9421/files/68198102162.pdf
    • https://cdn.shopify.com/s/files/1/0435/8845/2515/files/gefazazitager.pdf
    • https://cdn.shopify.com/s/files/1/0437/3810/3962/files/zasozumanetegupo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4228/2394/files/mojesedikikuboxubovukuvu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5085/files/refesipumalu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3740/8936/files/mosevojenov.pdf
    • https://cdn.shopify.com/s/files/1/0433/6346/7414/files/xozutigeboxikigikike.pdf
    • https://cdn.shopify.com/s/files/1/0428/5503/9135/files/39828452277.pdf
    • https://cdn.shopify.com/s/files/1/0437/0785/9096/files/2013_ford_f_150_maintenance_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0428/7656/7711/files/rukagumowewes.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_off000092ca.bin
b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92CA 2828 bytes
font_01_sfnt_off00009cc5.bin
ec2640a6ca8dc65db019621ad592f9c876bea122b144d88046651a5c29f62ebd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CC5 4996 bytes
font_02_sfnt_off0000ade4.bin
5c0214dada4d54c1b8e9a70f43c5ef924305db1880d7c7d86b411fb12f9122fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADE4 15312 bytes

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