Malicious PDF — malware analysis report

Static analysis result for SHA-256 602382466a263ffc…

MALICIOUS

PDF

39.3 KB Created: 2020-08-22 17:32:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8090aa54db861447325aecf5af496439 SHA-1: 21c7ff4442f6ff5cdac67cba404f3d6209ce2879 SHA-256: 602382466a263ffc95e4fca18dcfa4ab31c33a4b2fd670b6080709d7c2f5b2d2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which are designed to lead users to external sites. One of the primary links directs to a known malicious redirector, indicating a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious.

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=the+boy+is+mine++wendy+shay
    • http://files.aberdeenlatinschool.com/uploads/1/3/1/8/131856672/e1500d65.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/59569857375.pdf
    • https://cdn.shopify.com/s/files/1/0429/1205/5463/files/tegugame.pdf
    • https://cdn.shopify.com/s/files/1/0434/9935/6324/files/automatic_transmission_workshop_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3279/files/tekabujevekokowapul.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/dimap.pdf
    • https://cdn.shopify.com/s/files/1/0446/9473/2953/files/cytology_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3749/files/84746564524.pdf
    • https://cdn.shopify.com/s/files/1/0431/8006/4936/files/70890259767.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0433/files/xipibovipukodupeluwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/38410340139.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8854/files/72147284179.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3541/files/plague_inc_bio_weapon_guide.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_off0000553e.bin
f8008990a2a4d5ca00ca8f43262cea25e59b848e708e8bd535bb6829ea7f756c
pdf-font-stream PDF embedded font (sfnt) at offset 0x553E 5220 bytes
font_01_sfnt_off000066ed.bin
c7c6e2018fb1b185952f8794ec77c5357167f69820002ea8bcfafd1a8ffe5cd6
pdf-font-stream PDF embedded font (sfnt) at offset 0x66ED 13112 bytes