Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ad4645715375b9…

MALICIOUS

PDF

44.0 KB Created: 2020-08-22 00:15:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f53794dfd7cc19b5b8e7de247975a7d SHA-1: faf55f0723570f30c72a8e6eb0690293bd4ebfb4 SHA-256: 63ad4645715375b9292ca02be16368c732b13ca8da6ed2611e5ca2456014e300
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=bragg+creek+ski+trails+report'. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a link farm or phishing attempt. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.ru/pify?keyword=bragg+creek+ski+trails+report
    • http://files.nakedtrackdays.net/uploads/1/3/1/0/131070911/wunezoda_terigilovibiru.pdf
    • http://gipagal.lethbridgeelectrical.com/uploads/1/3/0/7/130776783/079b902.pdf
    • http://files.rachellwoodard.com/uploads/1/3/2/6/132682528/vokutolisame-kisetapotugup-xadutijumi.pdf
    • http://jotagakek.emexon-international.com/uploads/1/3/2/6/132682883/47fc546580648db.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/betrothed_to_the_dragon.pdf
    • https://cdn.shopify.com/s/files/1/0431/1095/7210/files/89797037038.pdf
    • https://cdn.shopify.com/s/files/1/0433/6241/8847/files/pinamusemobezefe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pedarivorenali.pdf
    • https://cdn.shopify.com/s/files/1/0432/3206/7739/files/12694125839.pdf
    • https://cdn.shopify.com/s/files/1/0440/7413/9813/files/baumannii_bacteria.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2943/files/adobe_lightroom_tutorials_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6346/files/piloputaguwader.pdf
    • https://cdn.shopify.com/s/files/1/0433/5173/6488/files/main_topic_worksheets_2nd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0450/0317/8148/files/sample_house_plans_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7210/2308/files/critical_thinking_worksheets_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0438/4758/1856/files/fupazovegopoxaso.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061de.bin
f3bb8586135deb2108bc4aa300461fbd9440bd379b073eafae95ee39a9e7dae5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61DE 4896 bytes
font_01_sfnt_off00007294.bin
bee86fcdbaf97ba462f10e787e8a42ac6a550fae4a317a802ee303684207c3c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7294 10024 bytes
font_02_sfnt_off000094fd.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94FD 4324 bytes

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