Malicious PDF — malware analysis report

Static analysis result for SHA-256 179cf3fb1141fcf8…

MALICIOUS

PDF

51.2 KB Created: 2020-07-29 21:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0e51ec54d62c4d1efafe8436298f77f SHA-1: f818fb67307e761f8d97cac8052c697b9133fc57 SHA-256: 179cf3fb1141fcf83b89ebb5b295852c82fdaa5dd4e1e039e8788e8614d69985
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body and embedded artifacts do not provide further insight into specific scripting or execution, but the presence of a malicious redirector suggests an attempt to lure the user to a compromised site, 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=bogy%25C3%25B3+bab%25C3%25B3ca+pdf
    • http://files.visittvillems.org/uploads/1/3/1/4/131438308/54fa8db6.pdf
    • http://files.healthandhappyheart.com/uploads/1/3/1/8/131856271/saxekumoruso.pdf
    • http://files.familiasdeterlingua.com/uploads/1/3/2/6/132681634/nebasatuveba.pdf
    • http://files.fauxmesticgoddess.com/uploads/1/3/1/8/131856381/gevaxil.pdf
    • http://files.greenentree.com/uploads/1/3/2/7/132740949/bilovozomizamuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8510/3258/files/lexofegij.pdf
    • https://cdn.shopify.com/s/files/1/0433/5396/4712/files/72522273232.pdf
    • https://cdn.shopify.com/s/files/1/0429/2814/4543/files/pumuzafunulifirawugutopas.pdf
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/45742162458.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/9492064649.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8372/files/jopiletewef.pdf
    • https://cdn.shopify.com/s/files/1/0431/1924/7514/files/3544606083.pdf
    • https://cdn.shopify.com/s/files/1/0432/2361/3595/files/zumilulajejaporukuludu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/19555153655.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/nomakixos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30553092986.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_off00008920.bin
926b2994e7d798b5989cca4737588abd4ed6bf22f2498320fb0c520b0c64fd08
pdf-font-stream PDF embedded font (sfnt) at offset 0x8920 4880 bytes
font_01_sfnt_off0000997e.bin
553ac5abe2fc71c46a78f9e4ad4d6edee18c5100a971a38b521d7e6ebabf2342
pdf-font-stream PDF embedded font (sfnt) at offset 0x997E 11572 bytes