Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb6036620e7a1d7b…

MALICIOUS

PDF

44.5 KB Created: 2020-08-07 06:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a878ea2344ebd33189baf6ce715a55d SHA-1: 0e68d96c5ecd67edde1e7e9f6865b519ac73937c SHA-256: bb6036620e7a1d7bfc10a1966df80abfcb50407935675a22f583a8d43a9f1f09
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to 'autoestima baja pdf'. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to increase visibility and click-through rates to the malicious redirector.

Heuristics 3

  • 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.
  • 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.com/pify?keyword=que+es+autoestima+baja+pdf
    • http://files.aaronkrohn.com/uploads/1/3/1/4/131453111/juvonowida.pdf
    • http://files.fusedancecollaboration.com/uploads/1/3/0/8/130874134/1107969.pdf
    • http://files.ashleyjoleendoulacare.com/uploads/1/3/1/0/131070992/vawugujatuju-jelesa-wosemudogok.pdf
    • https://cdn.shopify.com/s/files/1/0432/0067/6003/files/33838468646.pdf
    • https://cdn.shopify.com/s/files/1/0433/8365/2506/files/gardiner_egyptian_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/vetiretutaluvinomerewuzuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bojakotipizijogi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/check_mark_alt_code.pdf
    • https://cdn.shopify.com/s/files/1/0438/6367/0939/files/jibekiguvalemumobimut.pdf
    • https://cdn.shopify.com/s/files/1/0428/5834/8700/files/65755881887.pdf
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/the_everything_learning_german_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6331/files/sifitav.pdf
    • https://cdn.shopify.com/s/files/1/0433/4118/5189/files/11219711454.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/dukozizerofa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8348/9690/files/kewijujuzutigigonelusab.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_off00006e8b.bin
b075da3e177f4d562b7e9801b7f363c709862a23464523513e52cc55e7d30bfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8B 5336 bytes
font_01_sfnt_off0000809f.bin
e3764c587326bd5a00b989160fd55e43f7dd33bd3866e7a27b239f02552c124d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x809F 11308 bytes

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