Malicious PDF — malware analysis report

Static analysis result for SHA-256 e17461a44cf9b049…

MALICIOUS

PDF

52.2 KB Created: 2020-09-20 02:44:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfc2637733e42afa6e987939d54311ae SHA-1: b61b8856cc143f078b2fef35504ab300f61753ba SHA-256: e17461a44cf9b049961c01a319ab4bfb523c8492ec3b16c369b3c085ca3186aa
130 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on cdn.shopify.com. A low-severity heuristic indicates the presence of a visual download button lure. The primary malicious IOC is the redirector URL, which likely leads to further malicious 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.link/wix?keyword=uhc+texture+pack+1.14
    • http://files.bariatricsinc.com/uploads/1/3/1/8/131871433/3275605.pdf
    • http://rafun.pninax.com/uploads/1/3/1/4/131453960/jemivilefepurun_gutevikibaga.pdf
    • https://cdn.shopify.com/s/files/1/0476/7380/2918/files/tedasetegokedimijadu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1516/6357/files/educational_psychology_articles.pdf
    • https://cdn.shopify.com/s/files/1/0437/0386/1401/files/60836449749.pdf
    • https://cdn.shopify.com/s/files/1/0434/0508/2781/files/calculator_app_to_hide_pictures_on_android.pdf
    • https://cdn.shopify.com/s/files/1/0438/5013/7760/files/refractive_surgery_book.pdf
    • https://98b5b958-6c32-401f-870c-a126b4470b75.filesusr.com/ugd/7d2910_77edb1ddca4c4e07847043c815d9d757.pdf?index=true
    • https://74f35e68-9e45-48e7-890e-383d55587bc3.filesusr.com/ugd/f9fac6_3d3b9cab99e7442b8a840e92d7e0b47a.pdf?index=true
    • https://cebd6053-2220-48fe-883b-c5d1cb96a0aa.filesusr.com/ugd/1df9ea_eb387cedb6c5484aab015e7d2a915e32.pdf?index=true
    • https://ee7e8c3e-eead-4c86-ab2f-09e98bdc7625.filesusr.com/ugd/717a42_0daf8a2566434091a1bda67b32e087b3.pdf?index=true
    • https://27c9debf-6303-42dc-99dc-4f7452d37fd9.filesusr.com/ugd/7e84b7_6986c56e97ea49baafa138c910b363ad.pdf?index=true
    • https://b8d3893b-1a7c-41d7-b060-05dc0c7c2826.filesusr.com/ugd/fd9558_68563aee749345d6b77f70dc57a7eabc.pdf?index=true
    • https://7966c5c8-6753-4d68-ac4b-aee0e8ac67f5.filesusr.com/ugd/f0f215_29137e3fa4a3462ba9ad2b5c8ae0e2b8.pdf?index=true
    • 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_off000076aa.bin
e5fd9dc5885f412cf58424cdf70c22a4899a16546e0cae1474618170b09ba75b
pdf-font-stream PDF embedded font (sfnt) at offset 0x76AA 5108 bytes
font_01_sfnt_off0000881d.bin
8e6f101de607c0966379dfcc1b8fb9ad946d6835e2733bf9b21fbc311912620a
pdf-font-stream PDF embedded font (sfnt) at offset 0x881D 10784 bytes
font_02_sfnt_off0000ad3b.bin
9e4edf6a1157e5ab360bbe040d4a83d7f86ae60f6fa7bbedfc0f3423f6d29282
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD3B 16448 bytes