Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5f92f02fe6dfb5…

MALICIOUS

PDF

37.2 KB Created: 2020-08-31 07:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 651c01c3ba673b5bd723571fdc50cb45 SHA-1: 6c658747a6db70c227fe301d36f625aa7f199954 SHA-256: 0d5f92f02fe6dfb57341ddd42faba3a779facda298e11a712133e82aed2a3653
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to ttraff.ru, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the malicious URL and references to a water softener, likely a lure. The presence of embedded URLs and the ML classifier's high confidence further support the malicious classification.

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.ru/wix?keyword=fusion+nlt+water+softener
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/c836c3_55b3abc788c54c29aaab08fe528a3bb7.pdf
    • https://static.usrfiles.com/ugd/9b5f63_224fd05ab7b44a67a2cde7e3cfed4c89.pdf
    • https://static.usrfiles.com/ugd/136d07_a993f8a00b604a4f9baf72364d7032b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb8056e2478d4a9590e3d1a63ee3de1e.pdf
    • https://static.usrfiles.com/ugd/0a51c1_7bf01512179141a9821261828f105382.pdf
    • https://static.usrfiles.com/ugd/52b593_765341aafce2401b980f64483c27c604.pdf
    • https://static.usrfiles.com/ugd/34e21e_b5a72071c2fc47948d4379b7a6bb645e.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_7ef448d4a0f24c0f92b7b38c3da659ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_447a6753bb234add81661ee07112d95c.pdf
    • https://static.usrfiles.com/ugd/ae15ca_1f5624cea27749ef8281dcff0e37bccb.pdf
    • https://static.usrfiles.com/ugd/8cbfce_3709fec8db43498c9be073e503dbbf58.pdf
    • https://cdn.shopify.com/s/files/1/0431/0695/9514/files/rite_of_spring_imslp.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/jivotomomowula.pdf
    • https://cdn.shopify.com/s/files/1/0435/1731/3178/files/56809704808.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_off000054de.bin
b836f583c3ffc2e27cf0515c5b51082fcc301e83106e42efc61c0592b2e1ce39
pdf-font-stream PDF embedded font (sfnt) at offset 0x54DE 4808 bytes
font_01_sfnt_off00006558.bin
1311bd794f1113d93155898d2d17da60794d7956bcd0b61396e76c619098f855
pdf-font-stream PDF embedded font (sfnt) at offset 0x6558 10280 bytes