Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cb732635ae5304d…

MALICIOUS

PDF

45.2 KB Created: 2020-08-31 11:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e36f7818ea9d50e7cb7ab7e7de07d23 SHA-1: 61cc70202ff5b310820c8ddc857060de935b945f SHA-256: 6cb732635ae5304d4573ba662b3cb9bde262d4295322b5ef47acdd061c2ea5c1
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body, though heavily obfuscated, contains a reference to 'Sierra norte de oaxaca gastronomia' and a URL that appears to be part of a link farm designed to attract search engine traffic. The primary malicious activity observed is the redirection to a known malicious URL.

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.link/wix?keyword=sierra+norte+de+oaxaca+gastronomia
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/fd7405_d5a5b3b8af1344a8b73b466eed464d50.pdf
    • https://static.usrfiles.com/ugd/a640e9_dee30920f2714ae1a1643969e269a583.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_cd8aa2ceab8e46c599c83af91007958c.pdf
    • https://static.usrfiles.com/ugd/b8c837_0386f3b8c84d4403ae92a649a43a33dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_2cdd7914f6664c0fb4f3b3874868d185.pdf
    • https://static.usrfiles.com/ugd/b8c837_b71340a52ce44950926d405c7b26cc05.pdf
    • https://static.usrfiles.com/ugd/93c935_46c78ba609b94c6fb74f7e03ec12d84b.pdf
    • https://cdn.shopify.com/s/files/1/0435/9290/8963/files/92862243732.pdf
    • https://cdn.shopify.com/s/files/1/0437/6212/2903/files/57901556552.pdf
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/82072566482.pdf
    • https://cdn.shopify.com/s/files/1/0433/8571/6886/files/nowukugojixupa.pdf
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/film_benyamin_s_setan_kuburan.pdf
    • https://cdn.shopify.com/s/files/1/0435/4896/7061/files/mobile_tracker_app_free_for_android.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_off00006f72.bin
ab7ea82634ec6163d75888d925c00a93e4576619f9f025f1e3bffd76b2a2eb9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F72 5400 bytes
font_01_sfnt_off000081ab.bin
679c20eea85479ef8836af9e2a6372ee5d0fd7e2e81193099d22f4d7bc5e3f89
pdf-font-stream PDF embedded font (sfnt) at offset 0x81AB 11068 bytes