Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b364e3ba11b395…

MALICIOUS

PDF

43.2 KB Created: 2020-08-04 11:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28e5d0145fae2c5bf5fc32d67606dba8 SHA-1: ea70a1338d57e5f11e37fad4d2ee0b1dc5cbcd41 SHA-256: 69b364e3ba11b39543ed998a98eadca200087c9179421bf1cf1d81552a09f7ab
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One of these links, 'https://ttraff.cc/pify?keyword=reliability+of+safety+critical+systems+theory+and+applications+pdf', is identified as a malicious redirector. The document's structure and the presence of numerous links suggest an attempt to direct users to potentially harmful websites, 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.cc/pify?keyword=reliability+of+safety+critical+systems+theory+and+applications+pdf
    • http://files.knowingourpast.com/uploads/1/3/1/4/131406676/485b8a.pdf
    • http://files.nevewinter.com/uploads/1/3/0/7/130740221/ripemizirimeje_wokedisi.pdf
    • http://files.toyouinspireflowers.com/uploads/1/3/0/7/130776521/5793582.pdf
    • http://files.azfearvbc.com/uploads/1/3/1/8/131871518/lonakuzo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xiguxalenagidofivixonagez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xodowowesibaxen.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/34414246644.pdf
    • https://cdn.shopify.com/s/files/1/0434/4273/3221/files/33421694526.pdf
    • https://cdn.shopify.com/s/files/1/0431/6558/1468/files/wya_urban_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0431/2832/4257/files/tobetavi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0940/1254/files/62571978727.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/gutazo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7291/files/jidajereripedunilito.pdf
    • https://cdn.shopify.com/s/files/1/0435/8681/4109/files/3167603706.pdf
    • https://cdn.shopify.com/s/files/1/0435/0512/3493/files/nipoditepib.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_off00006a57.bin
120b9614d82cfc1a6afd54d7df463d7cf58d555a8ecd4839e1d3c542f710c6d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A57 5644 bytes
font_01_sfnt_off00007d6b.bin
e874fd1f2e190c04e75e7dc060528dc35e685c1b50a96a9bb72c9b0712b0d524
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6B 9828 bytes