Malicious PDF — malware analysis report

Static analysis result for SHA-256 17aac62202030753…

MALICIOUS

PDF

45.2 KB Created: 2020-08-23 04:46:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d39deaf23793fcd25c7d8f10099313bb SHA-1: deecbff0ee56268321ab406e53712bfcb4b1dcc0 SHA-256: 17aac62202030753c51314d72b0d51eda1872209dac52531dde0b648b3478d17
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a link farm pointing to a malicious redirector. The document body, though partially corrupted, contains text suggesting it is a 'study guide' lure, and the primary URL points to a redirector that likely serves malicious content. No scripts were extracted, but the presence of many external links and the malicious redirector strongly suggests a phishing or malware distribution attempt.

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.ru/pify?keyword=best+asvab+study+guide+for+navy
    • http://files.moonbouncerentals.net/uploads/1/3/0/9/130969305/lupugufogoja.pdf
    • http://files.yggllwyncelyn.cymru/uploads/1/3/1/4/131453365/1764739.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0454/0868/2152/files/85255115965.pdf
    • https://cdn.shopify.com/s/files/1/0431/2684/9700/files/advantages_of_internet_in_business.pdf
    • https://cdn.shopify.com/s/files/1/0436/8341/4169/files/kosagezeli.pdf
    • https://cdn.shopify.com/s/files/1/0433/2286/7880/files/94926173947.pdf
    • https://cdn.shopify.com/s/files/1/0428/9950/5311/files/investigative_consumer_reporting_agencies_act_california.pdf
    • https://cdn.shopify.com/s/files/1/0437/4839/3112/files/tv_listings_san_jose.pdf
    • https://cdn.shopify.com/s/files/1/0436/1378/2178/files/20028419229.pdf
    • https://cdn.shopify.com/s/files/1/0430/5548/0981/files/against_all_odds_book.pdf
    • https://cdn.shopify.com/s/files/1/0427/6014/3014/files/93805778744.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d10.bin
02a4e446a2da3c935e9a82f0d9f9ea50e1a6ddfb430b98f2e9e4c4467dd0c68b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D10 5392 bytes
font_01_sfnt_off00006f80.bin
0cfa434104735ee55051f7ff570527587fb4dc223ca54fb2772d39116d3a5156
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F80 10396 bytes
font_02_sfnt_off00009346.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848
pdf-font-stream PDF embedded font (sfnt) at offset 0x9346 16092 bytes