Malicious PDF — malware analysis report

Static analysis result for SHA-256 6388696e4275baaf…

MALICIOUS

PDF

40.1 KB Created: 2020-07-10 02:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a01a8d8a248d9bb69b923021e6d62ceb SHA-1: f8e90969778108dd148003a236ae7985bff85f6b SHA-256: 6388696e4275baafa129415e28ae85ac1463208a18cd8859268d1e91df589e9b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. The primary link directs to a known malicious redirector, suggesting an attempt to lead users to malicious content or phishing sites. The document body itself is obfuscated but contains similar URLs, reinforcing the 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.com/wb?keyword=multiplying%20fractions%20with%20cross-simplifying%20worksheet
    • http://files.thewrestlingkennection.com/uploads/1/3/0/7/130739557/53a1f6b2.pdf
    • http://files.eileenchai.studio/uploads/1/3/1/0/131070378/3869719.pdf
    • http://files.elenamalamou.com/uploads/1/3/0/9/130969702/mokiravoz_gitazux.pdf
    • http://files.northbeavercontracting.net/uploads/1/3/1/6/131606631/rodelad.pdf
    • http://files.tasty-ink.com/uploads/1/3/1/4/131437636/4162147.pdf
    • http://files.landscapesplusbydave.com/uploads/1/3/1/4/131453198/7218055.pdf
    • http://files.fitnessfactory1.com/uploads/1/3/0/7/130739567/3499249.pdf
    • http://files.monetwithacamera.com/uploads/1/3/0/8/130873830/zisiwub_sixed.pdf
    • http://files.homewise618.com/uploads/1/3/1/6/131637850/4d5a83f.pdf
    • http://files.roadhomefredericton.com/uploads/1/3/2/6/132682134/f5bd79237c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://naxavolode.files.wordpress.com/2020/07/2343393159.pdf
    • https://badodisorel.files.wordpress.com/2020/06/55130704557.pdf
    • https://wuvefobuwol.files.wordpress.com/2020/06/vivelalitisad.pdf
    • https://jiwuvef.files.wordpress.com/2020/07/naxunoronubozasenesozon.pdf
    • https://luxuvolug.files.wordpress.com/2020/06/favoju.pdf
    • https://zajonivuv.files.wordpress.com/2020/07/78663612172.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/duwaxufezemurogagur.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22945880436.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ketotojugidumirazi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12729031526.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41230052817.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_off00005e0b.bin
e0d98c266e7d98f12085937b241003654241c507a69aff618604e1e35d648148		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0B 5604 bytes
font_01_sfnt_off00007110.bin
7e7dc7805ef82be66592ec7dad9027791536e568e74bd28daab6912135686f89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7110 9932 bytes

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