Malicious PDF — malware analysis report

Static analysis result for SHA-256 507aacefbfaa5bba…

MALICIOUS

PDF

48.3 KB Created: 2020-08-19 23:24:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70624ad36cee676245f684af7b918a77 SHA-1: df4a02dc761469a51f286ac325196b63052edac4 SHA-256: 507aacefbfaa5bbae2e28855d3a3e70029cbca0e9dc34ae56876ac7628f5d301
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains text related to splitting PDFs and references the malicious URL. The primary attack vector appears to be a lure to a malicious redirector, likely for further payload delivery or phishing.

Heuristics 3

  • 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.
  • 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=diviser+pdf+en+plusieurs+pages
    • http://files.sarahwisemanphotography.com/uploads/1/3/2/6/132681392/ziviv-jemorad-merufot-rikofemufovub.pdf
    • http://files.kathrynemyoung.com/uploads/1/3/1/0/131071076/porewuvofadaxa.pdf
    • http://files.jasmafusioncuisine.com/uploads/1/3/1/0/131071256/7f66ac23c73b19f.pdf
    • http://files.manart1969.com/uploads/1/3/0/7/130740561/5135313.pdf
    • http://gajex.magicbrushpottery.com/uploads/1/3/1/3/131378991/gagadivu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1011/3186/files/cubic_regression_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0432/3888/3495/files/tekelitudarirumeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/endnote_x4_free_for_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/51269733111.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/stardew_large_egg.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5254/files/gazezodexad.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/76881120057.pdf
    • https://cdn.shopify.com/s/files/1/0435/7259/2801/files/disaluzokudogenonazon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/60967630872.pdf
    • https://cdn.shopify.com/s/files/1/0440/7282/9078/files/jingles_bait_and_tackle_fishing_report.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_off00007a56.bin
92241dd1070be626a693cf590f290f481f95ef25816d16a0b974a1ba80adf970		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A56 5268 bytes
font_01_sfnt_off00008c58.bin
58f1f212d0e36c3c4b0cb0fd8dd6353f4540b18915b9095919f83c3c9159f7bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C58 12268 bytes

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