Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d269f08463128b…

MALICIOUS

PDF

42.6 KB Created: 2020-09-03 23:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ccd9b36689b18784f974d1f54810de8 SHA-1: 73d80b8a52e8c56db3c21c6114417247cf7de30c SHA-256: 69d269f08463128b5a86c235a6c3d116d3f766a6a54dd6e0d7a84cf16fcf2441
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a Boggle word game worksheet, which is a common social engineering tactic. The ML classifier strongly flagged this PDF as malicious, and it contains a large number of embedded links, many of which point to benign Shopify domains but one points to a suspicious redirector. No scripts were extracted, but the presence of embedded URLs and the nature of the heuristics suggest a phishing or redirection 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.me/wix?keyword=boggle+word+game+worksheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/rilakevimiwowewuber.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/27704387495.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2620/files/3d_audio_songs_djmaza.pdf
    • https://cdn.shopify.com/s/files/1/0470/9430/0830/files/anganwadi_ke_form_delhi_2019.pdf
    • https://cdn.shopify.com/s/files/1/0430/6550/8002/files/kudeda.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/faxonosuzovovipaxuzupe.pdf
    • https://cdn.shopify.com/s/files/1/0437/1152/9114/files/79270672580.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0492/files/vafoletujigadejebodevamej.pdf
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/apprendre_le_russe_lecon_2.pdf
    • https://cdn.shopify.com/s/files/1/0435/6286/0699/files/nogonikefojeti.pdf
    • https://cdn.shopify.com/s/files/1/0435/7138/0383/files/boston_university_ap_credit.pdf
    • https://cdn.shopify.com/s/files/1/0435/2878/1988/files/afl_rule_book.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_off00005ded.bin
127db79b91a982f77055292ed43bf87d717228115c39e168f1cfe1f6a4863508
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DED 5444 bytes
font_01_sfnt_off0000705a.bin
138c0e229ca9f7e56b6ae736d7d3abfbcfa44156a826ab84a08b7e1052c10fb7
pdf-font-stream PDF embedded font (sfnt) at offset 0x705A 14772 bytes