Malicious PDF — malware analysis report

Static analysis result for SHA-256 890564ecf9f70c84…

MALICIOUS

PDF

67.5 KB Created: 2020-08-15 18:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d82d066964d9931d2f0292750f644953 SHA-1: 35211c64167ace69e6eda78aa308b9b398cb6f8d SHA-256: 890564ecf9f70c84a706cacd9d8d1a454627edea666b5a9b859c0fde5b6aa6c1
160 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=brain+out+game+level+22+answer', is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain a lure related to a game answer, likely intended to trick the user into clicking the malicious link. The presence of a password-protected archive lure suggests a multi-stage attack where the PDF serves as a delivery mechanism for 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=brain+out+game+level+22+answer
    • http://mixedipev.teamacorntriathlonclub.org/uploads/1/3/0/7/130740450/675391c5.pdf
    • http://files.innerbeanaugusta.com/uploads/1/3/2/6/132695881/lunubawizilojilezo.pdf
    • http://kejufifiw.windows8cardgames.com/uploads/1/3/1/6/131607240/9541941.pdf
    • http://files.amores-project.eu/uploads/1/3/1/3/131381078/9798463.pdf
    • http://zosolida.kkpkp-pune.org/uploads/1/3/0/7/130776208/9214434.pdf
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/zosasedezefubisuluzaji.pdf
    • https://cdn.shopify.com/s/files/1/0428/0428/1511/files/rutewagigega.pdf
    • https://cdn.shopify.com/s/files/1/0429/2801/3475/files/77826711769.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/cookie_clicker_cursor.pdf
    • https://cdn.shopify.com/s/files/1/0427/9592/5671/files/keratin_structure_and_function.pdf
    • https://cdn.shopify.com/s/files/1/0437/1290/5370/files/95882625178.pdf
    • https://cdn.shopify.com/s/files/1/0428/8066/3705/files/36872218439.pdf
    • https://cdn.shopify.com/s/files/1/0438/0921/0529/files/70709730653.pdf
    • https://cdn.shopify.com/s/files/1/0438/6593/1936/files/jaban.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/20446355805.pdf
    • https://cdn.shopify.com/s/files/1/0431/9808/7328/files/gajugunojeri.pdf
    • https://cdn.shopify.com/s/files/1/0438/5941/1094/files/2008_volkswagen_eos_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/8882/2950/files/historical_timeline_template_google_slides.pdf
    • https://cdn.shopify.com/s/files/1/0433/1316/8542/files/sijodirinefo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3511/5176/files/tetovuxufupifogeja.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_off0000b4c1.bin
7de2ff06bf71290c7ae7ca84230269f388929f605d0b07947eb6f923c322e9f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4C1 5336 bytes
font_01_sfnt_off0000c6ec.bin
e751647ada12c58190c0aa7d31565e72639f06db2d6da025994321b2bd6ebea4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6EC 10148 bytes
font_02_sfnt_off0000e9ff.bin
7fa51e74bbdb2151a285290adb2bfc40a7d2253a62bf44421e2200841c878d8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FF 16440 bytes

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