Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cc458cac07ea976…

MALICIOUS

PDF

39.9 KB Created: 2020-09-02 22:50:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e5b68f734b4d6c9681250ac2d7d7ef2 SHA-1: 3e6c9e992b3af2e34cd0ebfce9780d3a92a5e693 SHA-256: 1cc458cac07ea97681c820ac46ce1a99e406737b6ff618076aa108092b5c52e0
128 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as a library book card template. The presence of a "Click here to download" call-to-action button further supports a social engineering lure. The primary malicious URL, https://ttraff.cc/wix?keyword=library+book+card+template, is flagged as a malicious redirector. The document also contains a large number of other PDF links, many hosted on cdn.shopify.com, which is indicative of a link farm, likely for SEO poisoning or to obscure the final malicious destination.

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.cc/wix?keyword=library+book+card+template
    • https://cdn.shopify.com/s/files/1/0467/8002/2937/files/56801129315.pdf
    • https://cdn.shopify.com/s/files/1/0434/2831/5293/files/important_synonyms_and_antonyms_list_for_ssc_exam.pdf
    • https://cdn.shopify.com/s/files/1/0435/9690/6659/files/78523820812.pdf
    • https://cdn.shopify.com/s/files/1/0430/6160/8599/files/vikulejiwosewujo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8787/2671/files/6125839884.pdf
    • https://cdn.shopify.com/s/files/1/0437/5393/0901/files/download_fifty_shades_of_grey_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/4640/2208/files/remote_mouse_for_fire_tv_android_app.pdf
    • https://cdn.shopify.com/s/files/1/0433/3826/8830/files/pudomumojejewasuzogola.pdf
    • https://cdn.shopify.com/s/files/1/0438/3775/1453/files/ken_park_movie_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/5280/0920/files/24915092818.pdf
    • https://cdn.shopify.com/s/files/1/0438/5089/1424/files/19913495294.pdf
    • https://cdn.shopify.com/s/files/1/0432/0854/0320/files/zilalabetanolanofid.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/daparurovebab.pdf
    • https://static.usrfiles.com/ugd/b8c837_1222179c8d6948a5a40eb6c91c9f5962.pdf
    • https://static.usrfiles.com/ugd/83e24f_cc398f6b3bf84743b052541a5201a090.pdf
    • https://static.usrfiles.com/ugd/8ba634_662a645e43c9450cb2827f52086c50d5.pdf
    • https://static.usrfiles.com/ugd/f103bb_50e4e3e19c904033b9969166ab30aa6c.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_off00005ee5.bin
6ed6a2196dc47ed2db2b4be6c3d723d9148bae21d12abab5ff94130543a6e62e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE5 5288 bytes
font_01_sfnt_off000070d4.bin
b23cbda2b4a0b6cd184329003bd7812ca1d3df7eb41b56ba7f7a15906207576b
pdf-font-stream PDF embedded font (sfnt) at offset 0x70D4 9916 bytes