Malicious PDF — malware analysis report

Static analysis result for SHA-256 089a17bcdf4b4a9a…

MALICIOUS

PDF

44.7 KB Created: 2020-08-16 17:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a80f0e4243007ff430e20391a445459 SHA-1: 3bca467b07877316b7c8af7975bf23bc7f01e79b SHA-256: 089a17bcdf4b4a9ac939446cbb4dc26b8876e52e1b6e9bd47f5acb9779f79658
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL designed to appear as a resource for 'family tree templates'. This suggests a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links, including a known malicious redirector, supports this assessment. No scripts were extracted, but the document's structure and embedded links are indicative of a social engineering lure.

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=family+tree+templates+with+pictures
    • http://tuluzoluv.cinquegranelli.com/uploads/1/3/1/4/131438667/ffec55e4d49.pdf
    • http://files.laurenmareephotography.com/uploads/1/3/2/7/132712129/vixosurigitobub-desomibanupakof-kolubu-bidogirelozip.pdf
    • http://zoxorek.writteninwood.com/uploads/1/3/2/6/132681352/f17ff6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/7016/6942/files/85178171730.pdf
    • https://cdn.shopify.com/s/files/1/0436/1152/1187/files/what_is_a._aae_file.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32808714247.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/2120903490.pdf
    • https://cdn.shopify.com/s/files/1/0440/9311/2472/files/cutting_edge_elementary_third_edition_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/pezajumukupu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1416/7450/files/kigutu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/90843315794.pdf
    • https://cdn.shopify.com/s/files/1/0437/4547/6762/files/nolowefu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jaled.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/tupuxopaxamasinex.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_off00007138.bin
695bd06b46e7ae4b263cbbe01de12e97f9e47d99598cc5c5cc3f1522a53592b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7138 5324 bytes
font_01_sfnt_off0000833f.bin
302457fd95be9c67caabc14b730aad53de048d88b89243fc4bcef4eac3aca22d
pdf-font-stream PDF embedded font (sfnt) at offset 0x833F 10200 bytes