Malicious PDF — malware analysis report

Static analysis result for SHA-256 f09c3f84b330e19b…

MALICIOUS

PDF

49.3 KB Created: 2020-08-13 04:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e981ddcbe1ecda7e3fbb5d3a059b941 SHA-1: c367bfb4e9e40c96ceb3a2c9b47ba7ccb4776762 SHA-256: f09c3f84b330e19b3d257f95efaf4e1de41bab6954d0b51263579a5bb7d27752
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a link that redirects to a malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded URLs suggest a SEO-based lure, attempting to trick users into downloading further malicious content. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL.

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=biozone+aqa+biology+workbook+answers+pdf
    • http://tuzesit.hairandbeautybyrochglow.com/uploads/1/3/2/8/132814930/kukevo.pdf
    • http://nidog.lindahubbardart.com/uploads/1/3/0/7/130775075/1783246.pdf
    • http://files.goldentoadtheatre.com/uploads/1/3/1/6/131606260/jenaluxo.pdf
    • http://nidog.lindahubbardart.com/uploads/1/3/0/7/130775075/1783
    • https://cdn.shopify.com/s/files/1/0427/9799/0055/files/siretavopawim.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3024/files/zasegigavitonotexakerol.pdf
    • https://cdn.shopify.com/s/files/1/0438/2926/4546/files/sosefukixepax.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9863/files/92288916778.pdf
    • https://cdn.shopify.com/s/files/1/0434/5007/3240/files/god_bow_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0437/0094/5048/files/st_clair_river_fishing_reports.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6863/files/60593528988.pdf
    • https://cdn.shopify.com/s/files/1/0445/9456/1188/files/bursitis_hip_stretches.pdf
    • https://cdn.shopify.com/s/files/1/0454/6107/8174/files/casework_process_in_social_work.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0297/files/44697404650.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/58927908139.pdf
    • https://cdn.shopify.com/s/files/1/0432/0333/0209/files/christian_baby_boy_names_starting_with_n.pdf
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/antresolka_profesorka_nerwosolka.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b3a.bin
135ee6b4469e2d91dcf0d7a5c6ca4c38416b48ed947d75e0a1f1177eae35e6e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B3A 3544 bytes
font_01_sfnt_off000077d1.bin
68e48f98e0821c9480047d4ee485475e5d1dc64dab6b9f032c0a37f82c7ff6f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77D1 5832 bytes
font_02_sfnt_off00008bc7.bin
53a48ce5ce974eeda361500de7f739fcb7e957815e8cd152e463393d145dc97c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC7 13776 bytes

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