Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea115480da12db5b…

MALICIOUS

PDF

37.3 KB Created: 2020-08-08 16:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f34704e4e02291b4f8c3d12f9583438 SHA-1: 4d846705c79ac1442a2cf1a9c6869fcd36526140 SHA-256: ea115480da12db5bd58503ff0019f6123ba3319d67562ede3bd6b664d6954e83
128 Risk Score

Malware Insights

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

The PDF contains multiple external links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, suggesting an attempt to distribute malicious content or engage in SEO abuse. The presence of a 'download button' heuristic further supports a lure-based attack. The primary malicious URL identified is https://ttraff.cc/pify?keyword=ielts+liz+reading+pdf+with+answers.

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=ielts+liz+reading+pdf+with+answers
    • http://files.closetluxeboutique.com/uploads/1/3/0/7/130775297/gififubobokepexuz.pdf
    • http://verebafu.kristinecali.com/uploads/1/3/1/6/131637016/be2b7569e.pdf
    • http://files.g-baldai.lt/uploads/1/3/0/7/130775346/22e7d54533.pdf
    • http://files.fineartfinewinefair.com/uploads/1/3/2/6/132680808/giguxas_zugowomi_terogi_lovevabedesar.pdf
    • https://cdn.shopify.com/s/files/1/0431/0505/8976/files/kuxewomujobepixotakagalal.pdf
    • https://cdn.shopify.com/s/files/1/0435/2435/8298/files/wugimutomerara.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/fegos.pdf
    • https://cdn.shopify.com/s/files/1/0437/6366/3009/files/adobe_after_effects_cs6_tutorial_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/2349/0457/files/fiketivumenuxeji.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0933/files/32033516678.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/nunogijuxutonijafemepojel.pdf
    • https://cdn.shopify.com/s/files/1/0432/3826/0899/files/nozogotiwebakesofara.pdf
    • https://cdn.shopify.com/s/files/1/0432/5959/2859/files/kapavewofasapev.pdf
    • https://cdn.shopify.com/s/files/1/0435/3818/6392/files/75445679622.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005368.bin
d1cfd6511c550428e71a2b4af188a282e033c8e5d2a25fe269cbae32c5fdb10a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5368 5380 bytes
font_01_sfnt_off000065ca.bin
dfb97d518fba7aa1325bd5f2df422d5a38d8439840501b92f25da0f096a5f435		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65CA 10240 bytes

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