Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fbaa448befb6518…

MALICIOUS

PDF

36.4 KB Created: 2020-08-27 15:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a85c1fd16e06eadd5ec67401f7b2f8e0 SHA-1: 27b5bc4206771204b4c56d96e5d921f958afd3a1 SHA-256: 0fbaa448befb6518167f66f06b7a27368112f27c8896c5da0770ddd582e84f17
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm of 26 external PDF links, with one pointing to known malicious redirector infrastructure. The document body also contains a direct link to this malicious redirector. This suggests an attempt to direct users to malicious content, likely for phishing or malware distribution.

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.me/pify?keyword=cissy+strut+lead+sheet
    • http://mogodaze.newthaiart.com/uploads/1/3/1/4/131454215/8653989.pdf
    • http://jinut.privateislandsproject.com/uploads/1/3/1/4/131437657/rivewop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/duwagetafas.pdf
    • https://cdn.shopify.com/s/files/1/0440/6339/1894/files/a_guide_to_sql_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/9477/6739/files/ankle_sprain_rehabilitation_program.pdf
    • https://cdn.shopify.com/s/files/1/0432/5687/3128/files/83705860772.pdf
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/43911820899.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2115/files/netflix_for_android_tv_app.pdf
    • https://cdn.shopify.com/s/files/1/0428/6060/9692/files/rudram_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0432/8528/2980/files/fevobopagifalile.pdf
    • https://cdn.shopify.com/s/files/1/0433/9338/4599/files/sageworozonunuxoni.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0134/files/nevos.pdf
    • https://cdn.shopify.com/s/files/1/0462/8673/3473/files/26661742066.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000043dc.bin
1fe30fcf9bfcee89a539eb6191cec52b55b12f1770c66da4657949f2b39ca7ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x43DC 4704 bytes
font_01_sfnt_off000053e7.bin
87e86c29a73ffeeb890a3b3b3397977c8065db4e4acc6fcd397b7dba064cc5a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x53E7 10268 bytes
font_02_sfnt_off0000770e.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x770E 4324 bytes