Malicious PDF — malware analysis report

Static analysis result for SHA-256 acc44a816d246e6a…

MALICIOUS

PDF

57.2 KB Created: 2020-09-08 03:25:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e73ed4247fa42a2be87f249f69cd236 SHA-1: b10aa71ecad539ccd749b8a7f55362bed3200dad SHA-256: acc44a816d246e6a7097232ac8257c9697b2aec8051dc3d21637e153d9916faf
128 Risk Score

Malware Insights

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

The PDF file contains a link farm and a malicious redirector, indicating an attempt to lead the user to a harmful website. The document body, though heavily obfuscated, contains the primary malicious URL. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted from this sample.

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.me/wix?keyword=free+sheet+music+klezmer+clarinet
    • https://static.usrfiles.com/ugd/3e0cb9_2f082d32289045a1b71b6b08e3009195.pdf
    • https://static.usrfiles.com/ugd/c1615c_a205b4c97e0a491080b40ceb7c2e0e15.pdf
    • https://static.usrfiles.com/ugd/e3325f_670cf40d10414826853b40c8bbe488ff.pdf
    • https://static.usrfiles.com/ugd/ea2f88_1e48234895fd4d6e84b5878eb02f2001.pdf
    • https://cdn.shopify.com/s/files/1/0437/6467/8817/files/83378203282.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/xusosuwakuxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4708/files/40913735442.pdf
    • https://cdn.shopify.com/s/files/1/0458/0540/4326/files/xerokerojamazirogimuxonu.pdf
    • https://cdn.shopify.com/s/files/1/0440/9199/8360/files/84154589748.pdf
    • https://cdn.shopify.com/s/files/1/0450/6599/4392/files/keto_diet_guru_mann.pdf
    • https://cdn.shopify.com/s/files/1/0470/6438/3656/files/police_report_search.pdf
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/45738402622.pdf
    • https://cdn.shopify.com/s/files/1/0433/5481/6665/files/luvemarusiwodu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5717/6986/files/english_spanish_idioms_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/juzopuzenafososokazulu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080db.bin
85b8895663cd95bec18ef2d2680a32903d42b21ac741433ace50ad818c3f48b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x80DB 4880 bytes
font_01_sfnt_off00009147.bin
f2f30720de9063c2f354c9fe975b25c4b08fe558be9adeec29f4c09b521d7818
pdf-font-stream PDF embedded font (sfnt) at offset 0x9147 10240 bytes
font_02_sfnt_off0000b48e.bin
15a68420f1c377824b8c1fd571ac7c30556db1b4bc05006bf44ec3f6c6c83208
pdf-font-stream PDF embedded font (sfnt) at offset 0xB48E 16120 bytes
font_03_sfnt_off0000c975.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xC975 4324 bytes