Malicious PDF — malware analysis report

Static analysis result for SHA-256 04708f33d6d155de…

MALICIOUS

PDF

35.5 KB Created: 2020-08-23 09:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ef23ca6036ecfd5a23ff08a463f8fcc SHA-1: 0e69dc6965e09e89cd4c5efc17433384902610f5 SHA-256: 04708f33d6d155de5703e9e8c9f01e8569cf44c95b466ac2f291bb1decba5afe
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 lure users with a game-related keyword. The ML classifier strongly indicated maliciousness, and the presence of numerous external PDF links suggests a link farm or SEO poisoning attempt. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document.

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=one+piece+online+2+pirate+king+guide
    • http://basujup.stchrislocker.com/uploads/1/3/0/8/130813765/d6ea6c1c7b030.pdf
    • http://files.deepaklalsaini.com/uploads/1/3/1/1/131164130/09a06035bc7e0a.pdf
    • http://kavawufod.royaltyscholar.com/uploads/1/3/1/8/131857054/mepodajivupirowema.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5663/5804/files/accessibility_checker_fors.pdf
    • https://cdn.shopify.com/s/files/1/0430/8228/5216/files/food_for_thought_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/6318/9405/files/best_free_dvd_burning_software.pdf
    • https://cdn.shopify.com/s/files/1/0434/7294/5312/files/immigration_police_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/9178/7937/files/chahat_full_movie_movies_counter.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6519/files/69698619179.pdf
    • https://cdn.shopify.com/s/files/1/0439/9919/9390/files/42036720233.pdf
    • https://cdn.shopify.com/s/files/1/0435/6459/7397/files/liranokunotitimasukixozo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8794/4096/files/49086859502.pdf
    • https://cdn.shopify.com/s/files/1/0431/2173/7882/files/binawabojafukizupobavawib.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6564/files/baptism_certificate_template.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_off00004c71.bin
b383ae85feb935dad99caaafc0a6fb957ebc71f51add2e4e9b9901088d91c4f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C71 5284 bytes
font_01_sfnt_off00005e72.bin
a7b5c2a7718b735830fcf626df83648cdc3b5872fe981382d902dc5e50ec7d40
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E72 10220 bytes