Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3df334694fa54ca…

MALICIOUS

PDF

42.5 KB Created: 2020-08-20 08:17:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9253fa7c85160817e03eedaf5d580be SHA-1: c3cc3acfcff8fc218c355d717a73691f68ff6f58 SHA-256: b3df334694fa54cab033d6f4c60a564efdf0f3e0839db0c96bb838a1cc3667cc
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=pubg+mobile+wallpaper+4k+for+android', which is also flagged as a malicious redirector. The presence of a 'download button' lure further supports the malicious intent of directing users to external, potentially harmful content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=pubg+mobile+wallpaper+4k+for+android
    • http://files.buildingmentalhealth.net/uploads/1/3/0/7/130776611/9c7aa9.pdf
    • http://witedeku.shopkaiapapaya.com/uploads/1/3/1/1/131163599/larowaw-wajima-wipavezipepow.pdf
    • https://cdn.shopify.com/s/files/1/0440/6630/8246/files/nulej.pdf
    • https://cdn.shopify.com/s/files/1/0435/5316/1367/files/nupedopiwon.pdf
    • https://cdn.shopify.com/s/files/1/0432/5860/9817/files/xenumipitugameva.pdf
    • https://cdn.shopify.com/s/files/1/0431/3936/7061/files/mods_da_era_do_futuro.pdf
    • https://cdn.shopify.com/s/files/1/0435/8291/4723/files/bobcat_853_specifications.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0433/files/coordinate_geometry_9th_class.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tikifulodu.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/19936174423.pdf
    • https://cdn.shopify.com/s/files/1/0432/6401/6539/files/saxorexonadawomovobipuvuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0441/files/sazafavobozezez.pdf
    • https://cdn.shopify.com/s/files/1/0436/0637/6611/files/acs_study_guide_organic_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/how_to_master_ccnp_switch.pdf
    • https://cdn.shopify.com/s/files/1/0432/7007/8617/files/frecuencia_cardiaca_perros.pdf
    • https://cdn.shopify.com/s/files/1/0435/2802/8312/files/zedexu.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_off00005a5d.bin
520bdc43c6d4eee2140ecacc41afc987ff87917a8a53748518b2b9ecb1bbd365
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A5D 5372 bytes
font_01_sfnt_off00006c8a.bin
8ef244c483988e026e23a40ceb80ed32d9912696883f87dd5b37bca8ab024eb2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8A 10012 bytes
font_02_sfnt_off00008eeb.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EEB 4324 bytes