Malicious PDF — malware analysis report

Static analysis result for SHA-256 991e0c508ad9a154…

MALICIOUS

PDF

54.7 KB Created: 2020-07-26 10:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62e875b11c86343f7de8e73fee9e92f0 SHA-1: 851936b35c4b984d2ee90a4da13b19df434cd220 SHA-256: 991e0c508ad9a154c13031c8d8be0d62a0040b5894f7dedd3ae7ad1c2670ad63
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=guitar+tab+template+google+docs'. This indicates the document's primary purpose is to redirect users to potentially harmful content. Additionally, a PDF link farm heuristic was triggered, suggesting the document is designed to host numerous external links, many of which are hosted on cdn.shopify.com but point to other PDF files. The document body, though heavily obfuscated, contains text related to 'Guitar tab template google docs' and the authoring application 'wkhtmltopdf', reinforcing the lure. No scripts were extracted from this sample.

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=guitar+tab+template+google+docs
    • http://files.ukenglishmyanmar.com/uploads/1/3/2/6/132681779/munusenifudoku.pdf
    • http://files.creative-change-management-online.com/uploads/1/3/2/6/132681438/bolexapedituxi.pdf
    • http://files.smokymountaintax.com/uploads/1/3/1/0/131069789/vudofirenosago.pdf
    • http://files.taralynnmacdougall.com/uploads/1/3/2/6/132696104/doxuxi_tasikeda_butulinexowuta.pdf
    • http://files.smokymountaintax.com/uploads/1/3/1/0/13106978
    • https://cdn.shopify.com/s/files/1/0437/2371/8824/files/zifagoreko.pdf
    • https://cdn.shopify.com/s/files/1/0428/9495/0556/files/1524891576.pdf
    • https://cdn.shopify.com/s/files/1/0430/7435/5351/files/vavojevafozasorisu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8419/3696/files/70984548471.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0561/files/61311909030.pdf
    • https://cdn.shopify.com/s/files/1/0438/3080/4637/files/ralezizifa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6824/3624/files/pulotaxima.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/89289683860.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/97991024223.pdf
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/14414904146.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/tagemazubisexa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2144/2965/files/4159264316.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000738d.bin
883ea97d9daf27cee1fdb979ba005db35e18c38038af6c338cc57a70ce6df322		 pdf-font-stream PDF embedded font (sfnt) at offset 0x738D 5340 bytes
font_01_sfnt_off000085b0.bin
05bedfb1291336d07dfddde0a01d6345b02b6bc292374d7f4a5f27168e1fc857		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85B0 3492 bytes
font_02_sfnt_off000093e4.bin
5380f056187da50056172b966932d3eb28bbf919838686f1c9ddb2de44ab1de6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93E4 10384 bytes
font_03_sfnt_off0000b7bb.bin
f3d537a75496ccc87d05ed4b58c5b0b7252e0887cb54daececbeb4e1d90d7aea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7BB 16080 bytes

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