Malicious PDF — malware analysis report

Static analysis result for SHA-256 17428b5162ef50c3…

MALICIOUS

PDF

40.7 KB Created: 2020-08-22 00:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad62927d025a33fdb542bbba5233124a SHA-1: d5f89e30a97920a8abb799a6bd7f2828a917172f SHA-256: 17428b5162ef50c38805f6997ddb0dc85055617daecd2aaf2b8e6bae3c63de25
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific URL pointing to a redirector, likely to deliver a malicious payload or phish for credentials. The presence of numerous PDF links and a critical redirector link heuristic indicates a malicious intent to drive traffic to potentially harmful sites. 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=soundcloud+premium+apk
    • http://norurak.educateart360.com/uploads/1/3/1/6/131637024/wukilusowulozemaz.pdf
    • http://lilowine.greenkayla.com/uploads/1/3/0/7/130738970/fawevizopaku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pujar.pdf
    • https://cdn.shopify.com/s/files/1/0440/7263/2470/files/fl_studio_newtone.pdf
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/18756786826.pdf
    • https://cdn.shopify.com/s/files/1/0428/7214/4038/files/26934730625.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1520/files/tonakigiwafidupogagimod.pdf
    • https://cdn.shopify.com/s/files/1/0446/2634/6147/files/punctuation_worksheets_for_grade_2_cbse.pdf
    • https://cdn.shopify.com/s/files/1/0433/7991/6967/files/what_s_my_google_id.pdf
    • https://cdn.shopify.com/s/files/1/0429/2440/8988/files/waffle_iron_reviews_consumer_reports.pdf
    • https://cdn.shopify.com/s/files/1/0437/2119/5669/files/65250785312.pdf
    • https://cdn.shopify.com/s/files/1/0431/7777/1162/files/36486317164.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/xutusav.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/free_nigeria_christian_songs.pdf
    • https://cdn.shopify.com/s/files/1/0437/5219/4202/files/che_guevara_books_in_tamil_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7854/9665/files/manuw.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_off000060d7.bin
797f7ae535c7525f387e3583caf0e751daa82de87a5c2460954c29de6827c1a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x60D7 5208 bytes
font_01_sfnt_off00007274.bin
f021c84ae3761bf0596f6b430abc73c92995fdba2de6fbe8f9756509e29a6f31
pdf-font-stream PDF embedded font (sfnt) at offset 0x7274 10524 bytes