Malicious PDF — malware analysis report

Static analysis result for SHA-256 982137c4b9b04c6f…

MALICIOUS

PDF

40.0 KB Created: 2020-08-30 10:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e30dcd549b3b44a79450ff254f821b2c SHA-1: 466aa54001c4dd21fa05c3b514d4feef735c8927 SHA-256: 982137c4b9b04c6fe7970d65cf5f4109b628538edd5b5203db2099b2a5979610
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a document about 'Urie Bronfenbrenner ecological system theory'. The PDF also hosts a large number of external links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites. The ML classifier strongly indicated maliciousness.

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=urie+bronfenbrenner+ecological+system+theory+pdf
    • https://static.usrfiles.com/ugd/b8c837_47e5c5547b27434584b39b494b5f558c.pdf
    • https://static.usrfiles.com/ugd/ceb2e8_aa9f334e100e4654a13fa43d3cc60255.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a9d218db1734f8c8b821eedfad2348a.pdf
    • https://cdn.shopify.com/s/files/1/0437/2869/9553/files/grey_knights_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/wikumonejalonujotanufif.pdf
    • https://cdn.shopify.com/s/files/1/0438/1776/2973/files/english_reading_comprehension_test_a2.pdf
    • https://cdn.shopify.com/s/files/1/0440/7505/7302/files/18664271969.pdf
    • https://cdn.shopify.com/s/files/1/0433/4610/0392/files/gram_positive_bacteria_cocci_spore_forming.pdf
    • https://cdn.shopify.com/s/files/1/0430/3133/0969/files/wowejususosikomejanikexi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tosinumemelijigejidab.pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2768/files/39295771275.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_off00005d77.bin
2f934737111ea183ff61e5e71b2ba34f4426d8d5f39061f1cf16010e6e694f2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D77 5800 bytes
font_01_sfnt_off000070fc.bin
2adf570550b8e61ccbe5afe197c35fc6233ee00817067ef0f7f535721bf216b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70FC 9940 bytes

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