Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b8f9fd2184cfc6a…

MALICIOUS

PDF

42.4 KB Created: 2020-08-10 00:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99ee83d52a37315fe7b66d0e347956bf SHA-1: 10568f2d53e84ef1898fda0427bb0e98264bbf6c SHA-256: 8b8f9fd2184cfc6a242b8b7183e18a02096376e04dc8a294791dca7330319a2a
136 Risk Score

Malware Insights

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

The PDF document contains text and embedded links that mimic a lure for 'Android secret codes pdf file download'. It utilizes a malicious redirector URL (https://ttraff.cc/pify?keyword=android+secret+codes+pdf+file+download) which is a critical finding. The document also hosts a large number of external PDF links, many pointing to benign Shopify domains, but the primary malicious link is the critical indicator. The presence of a 'download button' lure and invoice language further supports a social engineering attack pattern. No scripts were extracted from this sample.

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=android+secret+codes+pdf+file+download
    • http://mumogewo.nonails.net/uploads/1/3/1/4/131411896/81b1c3f57.pdf
    • http://files.northeastwisconsinwelding.com/uploads/1/3/2/7/132710690/kuteweposozax-gesetu-gizafojerup-lizexamakatazu.pdf
    • http://files.stedspsychology.co.uk/uploads/1/3/1/4/131453036/aa8bee0.pdf
    • http://files.0702stonestore.com/uploads/1/3/1/4/131454255/wisuzafikali-sukelexudarok-sodosag-bowipede.pdf
    • http://desejan.hollistermath.com/uploads/1/3/1/6/131636725/pupowajefekat-wumaxuzekix.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13139855908.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4085/files/jesumolinewaja.pdf
    • https://cdn.shopify.com/s/files/1/0428/6421/4175/files/free_birthday_card_template.pdf
    • https://cdn.shopify.com/s/files/1/0440/8557/5832/files/pujobemavopisuwuduziw.pdf
    • https://cdn.shopify.com/s/files/1/0437/1264/3227/files/antecedentes_de_la_administracion_de_compensaciones.pdf
    • https://cdn.shopify.com/s/files/1/0434/3853/8904/files/adobe_master_collection_cs6_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/telegikeve.pdf
    • https://cdn.shopify.com/s/files/1/0429/0890/9734/files/pozatuterosaxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/55106133089.pdf
    • https://cdn.shopify.com/s/files/1/0429/3417/3859/files/writing_for_scholarly_publication_huff.pdf
    • https://cdn.shopify.com/s/files/1/0429/5272/0543/files/modern_digital_electronics_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5080/3095/files/cooks_essentials_pressure_cooker_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/7292/9435/files/zagifezi.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_off0000691d.bin
7c014879d591af2f625090e2f2a26f61c7c849b5a5304e51289629848b09bb99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x691D 5228 bytes
font_01_sfnt_off00007b0f.bin
4ea942886dbdc4aeeb2acaa48110e4b7d97ba362a8e925d110466e994c7ddf2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B0F 9832 bytes

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