Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b5a98facbef043c…

MALICIOUS

PDF

45.6 KB Created: 2020-08-06 22:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d486dbdf15772b8db36aaf4728a3339 SHA-1: cc05006c86318f6ffa0be354b095455c5be65a00 SHA-256: 2b5a98facbef043c4dc4f7052fdaea3819e560d834b8ee32343617ae7dc46875
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=edit+pdf+file+online+tool'. This URL is presented within the document body, disguised as a tool to 'edit pdf file online'. The file also exhibits a PDF link farm heuristic, with numerous external links, many hosted on Shopify. The primary malicious URL is the most critical IOC, as it likely leads to further malicious content or phishing attempts.

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=edit+pdf+file+online+tool
    • http://files.afrofuturism-game.com/uploads/1/3/1/8/131871625/pubiruz.pdf
    • http://files.salembasketballofficials.org/uploads/1/3/0/9/130969408/kugigumafewos.pdf
    • http://files.karengoldfarb.com/uploads/1/3/1/4/131483603/84bcefc.pdf
    • http://files.breakingfreeky.org/uploads/1/3/2/7/132740457/a451a.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3464/files/64502396733.pdf
    • https://cdn.shopify.com/s/files/1/0433/3735/1323/files/very_hungry_caterpillar_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0639/3496/files/60278406131.pdf
    • https://cdn.shopify.com/s/files/1/0431/3533/6616/files/xulikawufinuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/5042/5753/files/cornerstone_chords_g.pdf
    • https://cdn.shopify.com/s/files/1/0437/0222/3013/files/32673905793.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2519/files/75120648753.pdf
    • https://cdn.shopify.com/s/files/1/0433/3400/8987/files/vuwofa.pdf
    • https://cdn.shopify.com/s/files/1/0436/1574/8253/files/41277913138.pdf
    • https://cdn.shopify.com/s/files/1/0428/4035/9068/files/65790835410.pdf
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/38484271683.pdf
    • https://cdn.shopify.com/s/files/1/0429/8768/4003/files/56314699340.pdf
    • https://cdn.shopify.com/s/files/1/0427/8566/9279/files/xuvafowukemope.pdf
    • https://cdn.shopify.com/s/files/1/0439/7580/3038/files/dazosukiji.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_off00007661.bin
61d21c0de2f2d84689b615fe126773bf34d21aee88f1149bea11188e98b41ab8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7661 4508 bytes
font_01_sfnt_off000085d1.bin
e5cdf3c760eefd5f2df9afab15beb2f259662f0b2dfdbfc4cac51a279f46ff24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85D1 10352 bytes

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