Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba2b36c958f943e…

MALICIOUS

PDF

43.1 KB Created: 2020-08-24 07:37:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21e637e4ba3577b5e249312331049111 SHA-1: 430ae9a950a3f4790257312cdc2ca96e76f611a9 SHA-256: eba2b36c958f943e6484dcf108977883ef25af3c92386484d0a328aaef9cd1a9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a review for a Honda Accord. This link, 'https://ttraff.cc/pify?keyword=honda+accord+2014+review+consumer+reports', is designed to lead users to malicious infrastructure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or redirection scheme.

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=honda+accord+2014+review+consumer+reports
    • http://nopape.justmichiganmade.net/uploads/1/3/0/7/130776330/punokoderun_xupaf_girekosozupise_bodorew.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7248/files/25530650654.pdf
    • https://cdn.shopify.com/s/files/1/0433/6946/3959/files/pomir.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/zexewulexunejo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8077/files/15551751269.pdf
    • https://cdn.shopify.com/s/files/1/0432/3780/2146/files/dozonoturedalifizixege.pdf
    • https://cdn.shopify.com/s/files/1/0436/9681/6282/files/89873805821.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/buluz.pdf
    • https://cdn.shopify.com/s/files/1/0431/8268/6362/files/givuludup.pdf
    • https://cdn.shopify.com/s/files/1/0440/2121/9493/files/64550979192.pdf
    • https://cdn.shopify.com/s/files/1/0434/1468/3815/files/body_mind_relationship_in_psychology.pdf
    • https://cdn.shopify.com/s/files/1/0434/1281/6039/files/atharvashirsha_english.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006793.bin
3fed39449b5395e84eb39a1f048cc11d6e613b77852e4d9b67d824ce636674ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x6793 5712 bytes
font_01_sfnt_off00007b0b.bin
9dc8718283327fe118e671da1c2e120b0262e86d2928fc7b9236c29bace14022
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B0B 10616 bytes