Malicious PDF — malware analysis report

Static analysis result for SHA-256 22730dcb2c1a5688…

MALICIOUS

PDF

37.5 KB Created: 2020-08-19 05:20:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4bc255980a3f3cdea797824303c6296 SHA-1: 5cea2257c6d5915ca6ec2065f01fee3c9b5478aa SHA-256: 22730dcb2c1a56885be86a70997abe6a287c2bb20260abd45e701300822adca7
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests a phishing or scam attempt designed to lead users to malicious content. The ML classifier strongly supports the malicious verdict.

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=generic+risk+assessment+template+australia
    • http://files.moonfulmama.com/uploads/1/3/1/6/131606677/1546056.pdf
    • http://kikefonas.heidylafleur.com/uploads/1/3/0/8/130814515/fiforugube_surikaw_pinaragema_jofafavagazuked.pdf
    • http://files.counselingfornewmoms.com/uploads/1/3/0/7/130739789/49717534ce6.pdf
    • http://nizar.prescottrealestatereferrals.com/uploads/1/3/2/7/132712326/rarigusofisakak.pdf
    • http://files.militaryhistorylive.com/uploads/1/3/1/6/131607075/maxumed-fovavokituraxev.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/game_copy_world.pdf
    • https://cdn.shopify.com/s/files/1/0439/3864/4123/files/deewana_bengali_movie_songs_320kbps.pdf
    • https://cdn.shopify.com/s/files/1/0451/9405/1735/files/the_city_of_god_augustine.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9069/files/nodijalabukig.pdf
    • https://cdn.shopify.com/s/files/1/0435/3160/0031/files/mujekajulujese.pdf
    • https://cdn.shopify.com/s/files/1/0435/4487/1063/files/confederation_of_british_industry_annual_report_2018.pdf
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/thyristor_c106d_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/9245/1232/files/fapiwegip.pdf
    • https://cdn.shopify.com/s/files/1/0440/2066/2422/files/mcconnell_brue_flynn_macroeconomics_20th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4447/files/difipikafobononur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/73121007565.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_off000049ba.bin
1dc09f54fd2af9a6963a598e2b63202bb13914ecfdd2bc49621acf089789861d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49BA 4948 bytes
font_01_sfnt_off00005a74.bin
e0bce1d9ea745615d2de493c5f1436408cfcc30fc24fc0f29285408375fd154f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A74 9456 bytes
font_02_sfnt_off00007ac2.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC2 4324 bytes

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