Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a23119a77d861a…

MALICIOUS

PDF

47.6 KB Created: 2020-08-02 14:00:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a64c53423ab0c05d7a85281188bd8bdc SHA-1: 1922bef5cdb5f945f68a318b4f522773849f370a SHA-256: 94a23119a77d861a5fe1f009e017400a8631f3e5fa09817d251f68ff8d7747b3
150 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous external PDFs, with the primary link leading to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=cookie+clicker+save+files', suggesting a lure related to game save files to entice clicks. The presence of a link farm and a malicious redirector indicates an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=cookie+clicker+save+files
    • http://files.basic-counseling-skills.com/uploads/1/3/0/9/130970003/cc7672df69f02e0.pdf
    • http://files.adrayer.com/uploads/1/3/0/7/130776073/5966019.pdf
    • http://files.cwhypnotherapy.com/uploads/1/3/2/7/132740214/3170171.pdf
    • https://cdn.shopify.com/s/files/1/0440/9131/0232/files/532866126.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/54489805199.pdf
    • https://cdn.shopify.com/s/files/1/0429/8306/3715/files/libudafasuxulejizubije.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zobuwavidojanunixi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/nitomesikiwajekerudegup.pdf
    • https://cdn.shopify.com/s/files/1/0428/3842/5766/files/wakidirulatilitum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bobidaxida.pdf
    • https://cdn.shopify.com/s/files/1/0428/9983/2995/files/jugukavegexenix.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/samuwixezejezuba.pdf
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/zaliludi.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/pusufasatuvirilinon.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/puparofurevugumedakavupu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5525/0598/files/nimuloged.pdf
    • https://cdn.shopify.com/s/files/1/0437/5976/3617/files/44260477012.pdf
    • https://cdn.shopify.com/s/files/1/0433/1857/5262/files/34942922246.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://orteil.dashnet.org/
    • 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_off00007407.bin
f396deb9e0698f209dfd32cc0f11f902c0d84ad16c2193783ba08b7cb1b09c75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7407 4904 bytes
font_01_sfnt_off000084cc.bin
e0767b4d97b274d6e25e0b7cce5a226a771fe4179d446272aeffcdafd4129c78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84CC 13552 bytes

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