Malicious PDF — malware analysis report

Static analysis result for SHA-256 7254979f9acf894b…

MALICIOUS

PDF

44.5 KB Created: 2020-09-18 00:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffeefdb950686a86f88a2652255ec393 SHA-1: 50a4ef68f42fcdd9f8979a4f2b0886f7b7c4cc7b SHA-256: 7254979f9acf894b920b372ff121be369e8bec3753b289f8480573f124536965
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the primary links directs to a known malicious redirector, suggesting a phishing or malware distribution attempt. The ML classifier also 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.link/wix?keyword=gutterball+2+license+code
    • http://files.riveroflifecambodia.org/uploads/1/3/1/1/131164355/5741545.pdf
    • http://jenozale.myshoppingpath.com/uploads/1/3/2/6/132682787/6579572.pdf
    • http://gujol.michiganburgerboys.com/uploads/1/3/1/0/131070442/mekesirowire.pdf
    • http://jiguse.antiqueneworleans.com/uploads/1/3/1/4/131482975/runejigipowi.pdf
    • http://files.heidimcgivern.com/uploads/1/3/1/4/131406036/tobiveluba.pdf
    • http://files.bradleyestates.co.uk/uploads/1/3/2/6/132682570/wirifobeje.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4590/3774/files/oracle_alter_user_unlock.pdf
    • https://cdn.shopify.com/s/files/1/0437/1392/1175/files/39834423849.pdf
    • https://cdn.shopify.com/s/files/1/0433/7801/6406/files/pukeferebawewadinudilefe.pdf
    • https://cdn.shopify.com/s/files/1/0434/0419/8044/files/xoturirejoxapojoluren.pdf
    • https://138bb71a-98bb-4552-bcbb-3c29e25487e3.filesusr.com/ugd/ed2d23_0c9ebf4dc4b04a2bb257ed6a0b1612be.pdf?index=true
    • https://c17b6df0-805d-4aee-b1f7-e8b7f488af29.filesusr.com/ugd/e49726_5eec1970f18a492b87ce814c660e5348.pdf?index=true
    • https://b612e12e-1197-438d-901e-cca78446ef8b.filesusr.com/ugd/bcd086_dd9ea856f9f34c3dab4fabcd69c32a70.pdf?index=true
    • https://3b17bbb6-794b-4f32-8227-739b3c245e58.filesusr.com/ugd/ace02d_4c8884d685c44e2292ca0c1b7a440bba.pdf?index=true
    • 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_off00007027.bin
9eaf77635fb245eab87dbbcef48d86f69cebb0ee6614f7cc0fc3d487f70b16f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7027 5236 bytes
font_01_sfnt_off000081fd.bin
e311a5e99c18aebb3ad8bca62d732d54b79404de8f935842ce3c5d27c2e82f45
pdf-font-stream PDF embedded font (sfnt) at offset 0x81FD 10340 bytes