Malicious PDF — malware analysis report

Static analysis result for SHA-256 6938fca4112b2ac9…

MALICIOUS

PDF

67.8 KB Created: 2020-08-27 18:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4cb6b1728d2ad0082920571f4ecc530 SHA-1: 272b13c79c2bf455b2e14ad5220c57c860710452 SHA-256: 6938fca4112b2ac93e3e5e86eb3dfd6ab547d96924000c7376f9055ca73d56e2
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=maths+formulas+in+hindi'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The presence of a 'download button' heuristic further suggests a social engineering lure. While no scripts were extracted, the overall structure and link analysis indicate a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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
  • 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=maths+formulas+in+hindi
    • http://files.coheartgallery.org/uploads/1/3/2/6/132682171/8382025.pdf
    • http://files.carolannliaros.com/uploads/1/3/2/6/132695258/banulewe.pdf
    • http://fitepaxi.southernplainsphotography.com/uploads/1/3/2/6/132680813/rojiwumugo_sekawitaniliz.pdf
    • http://raloxaf.hallsoflondon.com/uploads/1/3/1/0/131070374/fdda2.pdf
    • http://tiridixur.northcotejets.org/uploads/1/3/2/7/132712207/novenu_bisezugit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0428/1401/3606/files/juduzasuwobupojebalevole.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1164/files/faa_far_43.pdf
    • https://cdn.shopify.com/s/files/1/0464/5175/3128/files/77233362482.pdf
    • https://cdn.shopify.com/s/files/1/0464/1541/3416/files/pojenakenuja.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/48277393484.pdf
    • https://cdn.shopify.com/s/files/1/0433/6726/8517/files/29392111894.pdf
    • https://cdn.shopify.com/s/files/1/0437/4469/0337/files/85540401529.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/3ds_dump_files.pdf
    • https://cdn.shopify.com/s/files/1/0431/2809/4882/files/xujepojezodogipavirul.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ede.bin
cfdf59a0cc40cda50b922138463ecaa12fc447e9f282d0131606ef10d6057929		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDE 2868 bytes
font_01_sfnt_off00007911.bin
a99c0f379fb7b25a1600f465d8cdcd52aeeb445d29b385c27af471fe0be7d5bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7911 5152 bytes
font_02_sfnt_off00008a68.bin
d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A68 3720 bytes
font_03_sfnt_off000095cc.bin
1a8b5bea29c70ccb64bd5980b23cae10c183d140d5b3741fc7d883c7836f6937		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95CC 14520 bytes
font_04_sfnt_off0000c41c.bin
3498d862a8a9230ded6249e3500034f9a8bb908030a28153d3802a868d32f426		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC41C 16240 bytes
font_05_sfnt_off0000d9dd.bin
60ea7ac07349d96eff6a09bc635bc10557d8cb62fcc0a975514e48868d9fbafc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DD 11548 bytes

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