Malicious PDF — malware analysis report

Static analysis result for SHA-256 549939ee51afcef5…

MALICIOUS

PDF

52.5 KB Created: 2020-08-31 08:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8948c09c180bba2088e6b296433936b7 SHA-1: 3927546baa91d90784e5edaaf56b26bb6f68dee1 SHA-256: 549939ee51afcef561d3cd88b4240b2ebbecadfe12935b86d93646b33c4a3862
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its structure, which includes a large number of embedded links to external PDF files, a common tactic for SEO poisoning or link farming. One of these links, https://ttraff.com/wix?keyword=amar+y+depender+pdf, is flagged as a known malicious redirector. The document body contains garbled text and references to 'wkhtmltopdf', suggesting it may be auto-generated content designed to host these links.

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.com/wix?keyword=amar+y+depender+pdf
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/vitemevefevotenidepila.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/69921409318.pdf
    • https://cdn.shopify.com/s/files/1/0439/7118/2750/files/30983971861.pdf
    • https://cdn.shopify.com/s/files/1/0428/3197/0471/files/limojarizono.pdf
    • https://cdn.shopify.com/s/files/1/0434/3965/3030/files/photo_collage_art_app_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/5726/4280/files/bagiwimofofemitajorisivog.pdf
    • https://cdn.shopify.com/s/files/1/0439/3913/5643/files/93286232515.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70354855800.pdf
    • https://cdn.shopify.com/s/files/1/0439/3782/4926/files/act_1_scene_2_hamlet.pdf
    • https://cdn.shopify.com/s/files/1/0430/4220/9945/files/aisi_4130_standard.pdf
    • https://cdn.shopify.com/s/files/1/0428/3318/2886/files/avatar_hollywood_movie_songs.pdf
    • https://cdn.shopify.com/s/files/1/0456/8252/4319/files/traffic_racer_apk_old_version.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57955619809.pdf
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/68558913475.pdf
    • https://cdn.shopify.com/s/files/1/0434/1825/5510/files/initialize_2d_array_java.pdf
    • https://cdn.shopify.com/s/files/1/0434/8697/0018/files/ccna_routing_and_switching.pdf
    • https://cdn.shopify.com/s/files/1/0435/6099/2927/files/wow_classic_gnome_engineering_guide.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_off000080eb.bin
be54528a3bd71bd0aa54832b201f69e9662f107a1f9c1a30dd35898903f0d42e
pdf-font-stream PDF embedded font (sfnt) at offset 0x80EB 4620 bytes
font_01_sfnt_off00009071.bin
c550e4bb2e62ba7601e110fc093259162025af5876994eea4f6dd63cfe3339b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x9071 11512 bytes
font_02_sfnt_off0000b5ef.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xB5EF 4324 bytes