Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e82c539ec1bd615…

MALICIOUS

PDF

57.9 KB Created: 2020-08-21 20:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0812dbad4212e82308fd0a2883874184 SHA-1: 21b68165e84d90f336b12147e54f46989cce687e SHA-256: 4e82c539ec1bd6158732b8e4f38b78761c6ef5b778427214d2650f747eacd0ac
128 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to benign Shopify URLs, but one critical heuristic identified a link to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'Spreadsheet compare 2019' and the malicious URL 'https://ttraff.ru/pify?keyword=spreadsheet+compare+2019'. This suggests a lure to trick users into downloading potentially malicious content. The presence of a 'download button' heuristic further supports this phishing-like attack pattern.

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.ru/pify?keyword=spreadsheet+compare+2019
    • http://dabowa.creedpaintings.com/uploads/1/3/1/6/131606069/niwitika.pdf
    • http://files.teressamediumreadings.com/uploads/1/3/0/7/130775952/subizidaba-lodozusixosimup-kumefixar.pdf
    • http://files.whizkidzfun.com/uploads/1/3/2/7/132740249/gikuserafasonawilip.pdf
    • http://razegegak.mcgilltennis.com/uploads/1/3/0/7/130776457/mowavugifofobawe.pdf
    • https://cdn.shopify.com/s/files/1/0435/6302/4547/files/baby_shark_piano_sheet_music_boss.pdf
    • https://cdn.shopify.com/s/files/1/0430/9739/1261/files/98588048848.pdf
    • https://cdn.shopify.com/s/files/1/0450/7618/5253/files/materiales_compuestos_aeronautica.pdf
    • https://cdn.shopify.com/s/files/1/0432/4311/0564/files/all_d_d_3._5_books.pdf
    • https://cdn.shopify.com/s/files/1/0460/2416/3487/files/kisumokofedosagamemego.pdf
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/etiologia_del_cancer_de_estomago.pdf
    • https://cdn.shopify.com/s/files/1/0429/7618/2426/files/machine_design_5th_edition_norton.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5469/files/85914752160.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6282/files/96238699336.pdf
    • https://cdn.shopify.com/s/files/1/0438/2726/5693/files/jexefedimojeburinafij.pdf
    • https://cdn.shopify.com/s/files/1/0434/4096/3751/files/sepon.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/28346758442.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_off00009327.bin
e57141c127d2aa0d7b7e2e11b2ab5801280eff10b74373bd05cb7a77a2211ecb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9327 5500 bytes
font_01_sfnt_off0000a5ce.bin
a33b766c66caf481b5b2b1b363f7a2037933f9be1fbb0b06b73a08ea4e59dfef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5CE 11684 bytes
font_02_sfnt_off0000cc30.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC30 4324 bytes

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