Malicious PDF — malware analysis report

Static analysis result for SHA-256 862a292b358819ca…

MALICIOUS

PDF

41.9 KB Created: 2020-07-09 07:21:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eda3da1e6c7947cac089fb25dfd9fb9a SHA-1: 2d5ee3b09931001092c3f73337cf6f191eb7d868 SHA-256: 862a292b358819cabe36654812462b002d6a9650a16ce5e077d06835fc1bf4f9
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to disposable domains and redirector infrastructure. The primary link directs to a known malicious redirector, suggesting an attempt to lead users to malicious content or phishing sites. No scripts were extracted, but the extensive link farm indicates a social engineering tactic to drive traffic to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=mutually%20exclusive%20and%20inclusive%20probability%20worksheets
    • http://files.laurenhollick.com/uploads/1/3/1/6/131606819/fefosugula_zufiki_nonatuxiv.pdf
    • http://files.cassidyforcc.com/uploads/1/3/2/6/132680994/5787021.pdf
    • http://files.jasminkwan.com/uploads/1/3/1/4/131453248/kubomerebamel.pdf
    • http://files.willowwildedges.com/uploads/1/3/1/8/131856443/xukopiwome-tojazelapiz-kasivezobisu-sunezurawuse.pdf
    • http://files.powerdotmath.com/uploads/1/3/1/6/131606640/8090761.pdf
    • http://files.cocovonbonbon.com/uploads/1/3/1/3/131378916/ecc1c82efced6.pdf
    • http://files.funthoughtsonlife.com/uploads/1/3/1/4/131483361/wazapoziwezowi.pdf
    • http://files.lsten.net/uploads/1/3/1/4/131406735/wifoja.pdf
    • http://files.reneeheissart.com/uploads/1/3/1/3/131398224/1164212.pdf
    • http://files.karandave.co.uk/uploads/1/3/1/0/131070525/4495050.pdf
    • http://files.electaylin.com/uploads/1/3/2/7/132740320/8322645.pdf
    • http://files.llamasintheclassroom.com/uploads/1/3/2/3/132302966/guwimo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://livasif.files.wordpress.com/2020/06/xakob.pdf
    • https://zijolaraf.files.wordpress.com/2020/06/pafikowemojabadineru.pdf
    • https://xaxuxite.files.wordpress.com/2020/06/58147775403.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fezusagofetivori.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijovosulodomozov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kewosa.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_off00006124.bin
aac7c3ee27adbfe0e763371cb1e847a92f151333fdd09f4f4b6b30beebde6acb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6124 5572 bytes
font_01_sfnt_off0000741a.bin
dd1a44cd7693732f91b048b0abfd71af78e1650688cb603195c8e4e1548c8ada		 pdf-font-stream PDF embedded font (sfnt) at offset 0x741A 11184 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.