Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d7af3a477319b62…

MALICIOUS

PDF

48.3 KB Created: 2020-08-18 16:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26792cf388d1669c0f8559728e6e17c6 SHA-1: d12bc13b73cbdb5fa9b4e30c6fa0d4b721a3acea SHA-256: 4d7af3a477319b628e83ea7b28d7ef04067d687669ecd5dc556977e3cac1650e
130 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files, a technique often used for SEO poisoning to improve search engine rankings for malicious content. One prominent link, disguised as 'Purple martin birdhouse plans pdf', redirects to 'https://ttraff.ru/pify?keyword=purple+martin+birdhouse+plans+pdf', which is flagged as a malicious redirector. The presence of a 'download button' lure further supports the malicious intent.

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.ru/pify?keyword=purple+martin+birdhouse+plans+pdf
    • http://domoxum.premsc.com/uploads/1/3/1/6/131637814/dovujegulikopujuxija.pdf
    • http://files.thecontemplativeacademy.com/uploads/1/3/0/9/130969190/luzafusabovadud.pdf
    • http://metuvube.menniescapens.com/uploads/1/3/2/7/132712326/6195271.pdf
    • http://files.annascafebar.co.uk/uploads/1/3/1/4/131406947/dametopujanoparoko.pdf
    • https://cdn.shopify.com/s/files/1/0447/8458/2813/files/fisiopatologia_de_esquizofrenia_paranoide.pdf
    • https://cdn.shopify.com/s/files/1/0435/6040/3103/files/kinematics_equations_practice_problems_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0430/0029/9683/files/zirovuzowuzizuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/8794/4094/files/guide_yasuo_mua_9.pdf
    • https://cdn.shopify.com/s/files/1/0437/4672/1946/files/scott_pilgrim_vs_the_world_game_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1609/3849/files/aprender_ingles_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0437/6385/9610/files/daxasijenirunafotajaxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8419/3697/files/lizadivanovaxateki.pdf
    • https://cdn.shopify.com/s/files/1/0432/7669/7760/files/eagle_scout_workbook_filler.pdf
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/maine_pyar_kiya_title_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9529/files/wumozenufakepumezora.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_off00007c99.bin
34c40aa34be562ee3daa591dbe38f5076eec12690d3298895ba376a3af2a9ce3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C99 5424 bytes
font_01_sfnt_off00008eca.bin
e47ac4175e19ac708643a171f8ac09f768b4a25fe3e4f47d697ec22692fb2b97
pdf-font-stream PDF embedded font (sfnt) at offset 0x8ECA 10612 bytes