Malicious PDF — malware analysis report

Static analysis result for SHA-256 7419e9030e50792e…

MALICIOUS

PDF

43.3 KB Created: 2020-08-15 07:21:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 180c18978fb1678cc3980616df87c1ff SHA-1: 3dfa9ce8994c2f5bc7de74a248e117aed67c4229 SHA-256: 7419e9030e50792efc66bf37851753abf26ecc7025afbf960635bfcdb187f8bb
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a coordinated effort to drive traffic or distribute malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful sites.

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=bluetooth+app+android+controller
    • http://files.mikegriffiths.net/uploads/1/3/1/4/131438460/8e8a03659fe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/vegamizezigiwukerade.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/zigox.pdf
    • https://cdn.shopify.com/s/files/1/0429/9823/5289/files/pathfinder_inner_sea_combat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6819160869.pdf
    • https://cdn.shopify.com/s/files/1/0438/2624/9885/files/60781370424.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zikoraj.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/win_10_hosts_file.pdf
    • https://cdn.shopify.com/s/files/1/0436/9373/6089/files/xeroxodaso.pdf
    • https://cdn.shopify.com/s/files/1/0430/6354/1917/files/chloroform_is_nonpolar.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/java_max_integer.pdf
    • https://cdn.shopify.com/s/files/1/0433/5042/5753/files/sulimajukikaropu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4877/8400/files/how_to_read_piping_isometric_drawing.pdf
    • https://cdn.shopify.com/s/files/1/0435/8111/2483/files/76163977751.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_off00006c4c.bin
033e7ff81c3093fe7b60b90a514a2351c44b4584554eb13fb54d35c20bef388f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4C 5032 bytes
font_01_sfnt_off00007d5a.bin
d6aa0d7cb389978860857119551fae605166538ae3f1d7039a23b8de4f0c4da0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5A 10140 bytes