Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eea659897f6aecb…

MALICIOUS

PDF

42.0 KB Created: 2020-08-20 21:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2176cad06c96102a4b21d886cb0413a1 SHA-1: 6ce9070c79f193c7d360651662137045be57082d SHA-256: 6eea659897f6aecb8ea0f36674b171357ac1d3a02cd89e62445ac03c61a868c5
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, disguised as a rental agreement. The ML classifier also strongly indicated maliciousness. The document body and embedded link structures suggest a phishing or scam attempt to redirect users to malicious content.

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=california+rental+agreement+in+spanish+pdf
    • http://xovamap.newbernapp.com/uploads/1/3/1/4/131437145/2105818.pdf
    • http://kogifewa.aeesei.com/uploads/1/3/1/0/131070571/badabezuwufuw_bedixubeviwonam_nokudagave_falipugesuvulo.pdf
    • http://lakodu.destyni.org/uploads/1/3/1/4/131438362/janixugozod-xegajufesuz.pdf
    • http://files.littlegrandadventures.com/uploads/1/3/1/4/131407818/f930b8d4574ec87.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5557/0341/files/creel_report_area_10.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/73597090918.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6269/files/tumilobib.pdf
    • https://cdn.shopify.com/s/files/1/0431/4441/3350/files/11670609063.pdf
    • https://cdn.shopify.com/s/files/1/0438/1828/7266/files/36826876403.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/76051622832.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/14183103734.pdf
    • https://cdn.shopify.com/s/files/1/0435/3176/3864/files/lepobaxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/9689/9733/files/wumukob.pdf
    • https://cdn.shopify.com/s/files/1/0433/2565/3160/files/maxon_cinema_4d_r20.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_off000066d9.bin
8a20c4b6548775cbe72b4e1d68cda70d3b0a1840f81439e3bf15633912aaebc2
pdf-font-stream PDF embedded font (sfnt) at offset 0x66D9 5360 bytes
font_01_sfnt_off000078e9.bin
45b991f92cb419b2fc263e384af75577d362913946f1d13ec07bf9aa5319910e
pdf-font-stream PDF embedded font (sfnt) at offset 0x78E9 10120 bytes