Malicious PDF — malware analysis report

Static analysis result for SHA-256 1132b90f0888ae74…

MALICIOUS

PDF

40.3 KB Created: 2020-08-13 22:02:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c028989b5f468d985d69b9370038e25 SHA-1: 6095cf1f94e8c9c27c4c5b1d5a60dd96b9c23d71 SHA-256: 1132b90f0888ae742e8f606bde09941ae1be3eefad722c4d3eb37f88cb9918c8
154 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to a link farm designed to generate SEO traffic. One prominent URL, 'https://ttraff.com/pify?keyword=home+background+hd+wallpaper', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other links, suggesting an attempt to drive traffic to malicious infrastructure, likely for further exploitation or phishing.

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/pify?keyword=home+background+hd+wallpaper
    • http://files.candlesinthedarkness.com/uploads/1/3/2/7/132740399/gigidi_viwareredo_misifumenos_xudetu.pdf
    • http://files.desertmirageaquatics.com/uploads/1/3/1/8/131856306/9775466.pdf
    • http://favezonev.durbanafrica.co.za/uploads/1/3/1/8/131871991/9302233.pdf
    • http://files.deevineimaginations.com/uploads/1/3/1/8/131871614/tubugeferoruwox-tedivurex-rawuz-sadexor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3789128943.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52135332303.pdf
    • https://cdn.shopify.com/s/files/1/0439/2170/3067/files/32687260844.pdf
    • https://cdn.shopify.com/s/files/1/0432/5307/2022/files/xawakojitoxuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7064/files/bofobuborunigewotak.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/lizajotuw.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7741/files/45696500078.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/62072742054.pdf
    • https://cdn.shopify.com/s/files/1/0433/7106/9594/files/28566267445.pdf
    • https://cdn.shopify.com/s/files/1/0428/1047/4663/files/38101901387.pdf
    • https://cdn.shopify.com/s/files/1/0431/7764/0092/files/23972074903.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_off00005ec9.bin
baecebe863c8749c1b1ee75605d19df00747e9137248792add13dba41a7ce351
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC9 5568 bytes
font_01_sfnt_off00007192.bin
758bdf04d937d09684dbf93998aabec453c43fbc0e35eaf41c41a402347589f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7192 10164 bytes