Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c837e249bf4ba64…

MALICIOUS

PDF

37.7 KB Created: 2020-08-08 17:02:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 495919735b327c50bc74e810d2cfe54d SHA-1: a16a2fe3e48c98758f4b73f64269cd76c1563a00 SHA-256: 3c837e249bf4ba64d847a4daed10f33c9806e75c722e0b7c60d1304961ebdf96
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is disguised as a search result for 'infiniti owners manual case'. The document body, though heavily obfuscated, also contains this URL. The PDF also exhibits characteristics of a link farm, with numerous embedded links pointing to external resources, likely for SEO manipulation or to host further malicious content. No scripts were extracted, and the PDF structure itself does not indicate specific exploit techniques beyond redirection.

Heuristics 3

  • 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.
  • 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/wb?keyword=infiniti%20owners%20manual%20case
    • http://files.sdcymbidium.org/uploads/1/3/2/6/132683267/9374837.pdf
    • http://files.seasidecrystals.com/uploads/1/3/2/7/132740296/zabenun_vumabesisa.pdf
    • http://kimigoga.yououghttowriteabook.com/uploads/1/3/2/6/132681824/3ac6684e.pdf
    • http://files.funseekersrebel.com/uploads/1/3/1/4/131453086/muzexib.pdf
    • http://files.blancplume.com/uploads/1/3/1/8/131871970/61ee6.pdf
    • https://cdn.shopify.com/s/files/1/0430/7533/8389/files/67960667437.pdf
    • https://cdn.shopify.com/s/files/1/0429/5655/4394/files/kelumuses.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4012/files/68326246601.pdf
    • https://cdn.shopify.com/s/files/1/0432/8439/8236/files/pibetuvukizo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4441/2314/files/gofalarusuj.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6166/files/dulazigatapekemisifekipi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1783/files/benumof_s_airway_management_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66083684812.pdf
    • https://cdn.shopify.com/s/files/1/0435/7718/0328/files/guvovajogasiw.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0422/files/afc_asian_cup_2020_time_table.pdf
    • https://cdn.shopify.com/s/files/1/0433/3862/9270/files/asana_pranayama_mudra_bandha_espaol_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0438/1101/2770/files/72157450275.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/dafawoniwelimawigoguku.pdf
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/bosch_maxx_5_washing_machine_manual.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_off000055a7.bin
fa98505184142c89f0d8941fd595e926f85ddc1404b667e73452bcc52bb3f62d
pdf-font-stream PDF embedded font (sfnt) at offset 0x55A7 5056 bytes
font_01_sfnt_off000066d4.bin
7fb5aeeb4ef82c3c08468c0ce5b239db986a07ad715cefb08ca971ac3143dad7
pdf-font-stream PDF embedded font (sfnt) at offset 0x66D4 10216 bytes