Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad35c9255b6ded94…

MALICIOUS

PDF

47.9 KB Created: 2020-08-20 09:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31c455a0eff1031446668cd850dce41d SHA-1: eb481349ae992a75da04210467d984e94718b075 SHA-256: ad35c9255b6ded941cc19a07553df02345ec47e16cbfd310d16123bbf9363127
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a large number of external links, many of which point to benign content on Shopify, but one critical link directs to a known malicious redirector. The presence of a 'download button' heuristic further supports the lure. The document body, though heavily obfuscated, contains the malicious URL, suggesting the PDF's primary purpose is to trick users into visiting this URL, likely to download a second-stage payload.

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/pify?keyword=pomelo+camera+pro+apk
    • http://files.shsu-catholic.org/uploads/1/3/2/8/132814182/73885e2de6.pdf
    • http://files.gmgsportstraining.com/uploads/1/3/1/0/131070560/zotomeguxew.pdf
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/mitosis_questions_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/gigofalobip.pdf
    • https://cdn.shopify.com/s/files/1/0450/9810/7045/files/fluid_mechanics_hibbeler_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/2113/9096/files/hombre_biopsicosocial.pdf
    • https://cdn.shopify.com/s/files/1/0428/8105/6935/files/hypoglycemia_guidelines_nhs.pdf
    • https://cdn.shopify.com/s/files/1/0436/9770/1032/files/koxopaxibatupolusaxapewu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/nodejs_read_file_line_by_line.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/holman_kjv_study_bible.pdf
    • https://cdn.shopify.com/s/files/1/0435/2576/7327/files/lobiribazulamudeguz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zutazalurofesavasa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1101/files/23709198007.pdf
    • https://cdn.shopify.com/s/files/1/0434/2359/6693/files/2020_volkswagen_beetle_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/benoxugidoxetive.pdf
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/bolebovegimasoregoger.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_off00005e70.bin
dbc4750844e3c24a032fd502ffe8e14ef8659955fde0e4e2d6e6b85553a74e2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E70 4964 bytes
font_01_sfnt_off00006f3a.bin
294798765c5892744c2e50a4a6c2240f6f99e0b887624efaabf44bf8b9fbb2da
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3A 16756 bytes
font_02_sfnt_off00009ce5.bin
975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CE5 16312 bytes