Malicious PDF — malware analysis report

Static analysis result for SHA-256 b42bb25161644949…

MALICIOUS

PDF

41.1 KB Created: 2020-08-19 12:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3094a2843122d1501e7b2d78d33c2baf SHA-1: 6dfad1710cf89822df6480579997ba2fe9354990 SHA-256: b42bb251616449498ddfb83c375a42920facd9e0b5c66268caeb74190f2215be
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one critical heuristic firing indicating it points to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The primary malicious URL identified is https://ttraff.ru/pify?keyword=automatic+writing+machine+project+report, which likely serves as a lure to a phishing or malware distribution site.

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.ru/pify?keyword=automatic+writing+machine+project+report
    • http://files.abbi.ca/uploads/1/3/2/8/132815388/ec4634d5fb6857c.pdf
    • http://files.wrighteau.com/uploads/1/3/1/3/131383456/jelefujopagawugud.pdf
    • http://rabej.sexualharassmentwebinars.com/uploads/1/3/1/8/131871674/datuzarurorop_dazidiw_gezasawor.pdf
    • http://files.spracklenpainting.com/uploads/1/3/1/3/131379699/4311204.pdf
    • http://files.bestfriendsdogtraining.ca/uploads/1/3/0/8/130813643/1621126.pdf
    • https://cdn.shopify.com/s/files/1/0434/1297/9869/files/fosupisawuvuda.pdf
    • https://cdn.shopify.com/s/files/1/0436/1083/3058/files/because_of_you_by2_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/augusto_de_campos.pdf
    • https://cdn.shopify.com/s/files/1/0433/3253/4440/files/gipubatunurepezuberez.pdf
    • https://cdn.shopify.com/s/files/1/0427/5548/9948/files/petofamu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/depusulolunifanilux.pdf
    • https://cdn.shopify.com/s/files/1/0429/8031/1203/files/wuketizilir.pdf
    • https://cdn.shopify.com/s/files/1/0437/2742/1608/files/twist_of_fate_full_movie_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/82238443018.pdf
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/slope_protection_methods.pdf
    • https://cdn.shopify.com/s/files/1/0432/9593/2584/files/69209764289.pdf
    • https://cdn.shopify.com/s/files/1/0437/2342/3912/files/27851610170.pdf
    • https://cdn.shopify.com/s/files/1/0437/3073/1173/files/ksrtc_bus_ticket_format.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_off000062a1.bin
17dac33918b2be15def67284fe77c3f9fa1fd5e4e96ba61e7e6e51a7577f8df6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A1 5292 bytes
font_01_sfnt_off00007487.bin
44ba22219e101dce112ec85d329c3b386e11be11f6716cbd7e24b9494f0e96aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7487 10192 bytes

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