Malicious PDF — malware analysis report

Static analysis result for SHA-256 152534f234449d29…

MALICIOUS

PDF

42.1 KB Created: 2020-08-18 14:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1815a38beb54a0b009adb3dd22def50 SHA-1: e7a4034fdbd30d8b855f16e5866b38f89e02c4ba SHA-256: 152534f234449d292702a2832307c3425de21745eabd4ef05845f0fb631f73f8
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Mailchimp template editing' and a URL pointing to 'ttraff.com', which is flagged as a malicious redirector. This suggests a phishing or scam attempt to redirect users to malicious content. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or content distribution network used by the threat actor.

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.com/pify?keyword=mailchimp+template+editing
    • http://zobobile.usanaapconvention.com/uploads/1/3/1/3/131379485/nuzetukelumudig_niwun.pdf
    • http://vobakaj.marshahuber.com/uploads/1/3/0/9/130969959/4060166.pdf
    • http://files.visitmojave.com/uploads/1/3/1/3/131382673/xuzuxen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/48076343033.pdf
    • https://cdn.shopify.com/s/files/1/0435/3831/7464/files/report_on_social_media_marketing.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/catharine_mackinnon_books.pdf
    • https://cdn.shopify.com/s/files/1/0429/1156/3932/files/22116018759.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5825/files/22820170944.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4748/files/27186842229.pdf
    • https://cdn.shopify.com/s/files/1/0434/5636/4711/files/nirarozamudat.pdf
    • https://cdn.shopify.com/s/files/1/0433/9931/5619/files/bejasizonatopiwapawuxa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/7609922086.pdf
    • https://cdn.shopify.com/s/files/1/0433/7854/0700/files/ganapati_atharvashirsha_in_marathi_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/texas_tech_transcript.pdf
    • https://cdn.shopify.com/s/files/1/0430/7409/3217/files/mizorimalovubis.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/56305714525.pdf
    • https://cdn.shopify.com/s/files/1/0431/9097/6673/files/pdf_to_word_converter_premium_apk_download.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_off00006584.bin
181c13e7ac9f05fc67c227c10d3b423958b6342ab3ed8aa305b5925fe354a602		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6584 5220 bytes
font_01_sfnt_off0000771f.bin
aef915d5e4840f38d3cfb96b9005ebb00c53e1fb27ec86d4634785bb8f8247ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x771F 11324 bytes

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