Malicious PDF — malware analysis report

Static analysis result for SHA-256 648277f9beb63243…

MALICIOUS

PDF

44.6 KB Created: 2020-08-13 17:13:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85c847b66d3b2721a74891f8579a0d9f SHA-1: ee21d1492b45da33baf92999a154cdd61c0848af SHA-256: 648277f9beb6324320e8618604001b3de38871a4d6f587c6dd6e16a376d80f68
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector infrastructure known to host malicious content. The primary link directs users to 'ttraff.cc', a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely for further exploitation or phishing. The ML classifier strongly indicated maliciousness.

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.cc/wb?keyword=zoe%20happy%20fit%20guide%20pdf
    • http://files.kerrydavies.net/uploads/1/3/0/9/130969426/fivaxivowopidi-votemajenupefu.pdf
    • http://sitowe.firesideballoonsforsale.com/uploads/1/3/1/4/131454065/rojekorig-kifed-bovurax-zafalez.pdf
    • http://files.akoyahealthandwellbeing.com/uploads/1/3/1/4/131406985/wububapinosozesapa.pdf
    • http://files.davidson-eng.net/uploads/1/3/0/7/130738921/jobideribuva_dujifibebudej.pdf
    • http://files.ticketyboomarketing.co.uk/uploads/1/3/0/8/130814717/8302490.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3760/5544/files/zegowiguwefinebobe.pdf
    • https://cdn.shopify.com/s/files/1/0434/5954/3192/files/assemblages_environments_and_happenings.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1945/files/7310020202.pdf
    • https://cdn.shopify.com/s/files/1/0434/9463/7734/files/14356217559.pdf
    • https://cdn.shopify.com/s/files/1/0433/7241/3079/files/jugavusoxuvuzosobax.pdf
    • https://cdn.shopify.com/s/files/1/0440/6312/9765/files/11128171478.pdf
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/33821946046.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/71463149005.pdf
    • https://cdn.shopify.com/s/files/1/0438/5406/9910/files/download_my_aadhaar_card.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/67020023721.pdf
    • https://cdn.shopify.com/s/files/1/0429/2041/1303/files/zosisatepitakuwel.pdf
    • https://cdn.shopify.com/s/files/1/0434/4224/1688/files/63577768970.pdf
    • https://cdn.shopify.com/s/files/1/0429/3256/8220/files/xufiximawazibeguluwekadi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2905/9994/files/fipasuzevuzub.pdf
    • https://cdn.shopify.com/s/files/1/0431/7764/0092/files/45177503147.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f06.bin
a8e15eeb93eee35116b78ec25e5ee2d3bab89bafe22014404b2e0a72e6966afa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F06 5056 bytes
font_01_sfnt_off0000804b.bin
47e7c1f3b85f9f9503a948c2d87f7ecfa8880f75989ede7059024aed8e05f4d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x804B 10852 bytes

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