Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e7238defa081b7…

MALICIOUS

PDF

53.4 KB Created: 2020-08-30 18:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7189906e2182cd393a1a25e14efa1032 SHA-1: a0191f505e692f1911a4b11d3e2c4026b6f742c1 SHA-256: 72e7238defa081b78aaf2652fac1e8c73b4ad2aa4f2ec99c90bbda919dab4d5f
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting a lure related to 'the six pillars of self esteem pdf', which is then followed by the malicious URL. 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.com/wix?keyword=the+six+pillars+of+self+esteem+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b65acf_92735fef12dd428f8d1160b7a1fe36b2.pdf
    • https://static.usrfiles.com/ugd/4e6dd5_cdf819263990415d8bfbaee3c1fec2ff.pdf
    • https://static.usrfiles.com/ugd/0b46e6_cef31b9c86004a248d97ed4ebdaf7409.pdf
    • https://static.usrfiles.com/ugd/a4e402_931ccd3bbaf24e4bb0cf669ddfbe56e3.pdf
    • https://static.usrfiles.com/ugd/10a4aa_47b70805d95d4265bfecb53c0718d56a.pdf
    • https://static.usrfiles.com/ugd/2f7815_26f937d2e3614145837cbf3ad327a8a6.pdf
    • https://cdn.shopify.com/s/files/1/0435/5879/7471/files/patofenixisoxuloj.pdf
    • https://cdn.shopify.com/s/files/1/0433/2178/6521/files/zilew.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/1717815910.pdf
    • https://cdn.shopify.com/s/files/1/0432/7230/6846/files/33041101207.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5388/files/englisch_abituraufgaben_mit_lsungen.pdf
    • https://static.usrfiles.com/ugd/55cc32_3c0905df47804a95aeddc1f59ae8df37.pdf
    • https://static.usrfiles.com/ugd/1e32c2_23155fc93b264896bda397d011b86a64.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_off00009438.bin
025e422a4622369e7a4978690cc4061d147d2f0da9903876ce04ef4909c0a556
pdf-font-stream PDF embedded font (sfnt) at offset 0x9438 5300 bytes
font_01_sfnt_off0000a61a.bin
da72d6a06dabe3ba190aa7780dde08464b76c4c1032c41e10ce9ab24bddaf257
pdf-font-stream PDF embedded font (sfnt) at offset 0xA61A 10224 bytes