Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c5d74f372725c90…

MALICIOUS

PDF

43.0 KB Created: 2020-08-17 05:43:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 705db570eba0818bc266fe67c57df68c SHA-1: 4d1ae5f210e2c6d24828fee0257ff8b09f413d61 SHA-256: 0c5d74f372725c903d4dc8d0e938d87125fdab105d81b8fae764639ba0d8658a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits malicious characteristics, primarily through the embedding of a large number of external links. One of these links, 'https://ttraff.ru/pify?keyword=agrochemicals+books+pdf', is identified as a known malicious redirector. The presence of numerous links, many pointing to Shopify domains hosting PDFs, suggests an attempt to manipulate search engine results or redirect users to malicious content. No scripts were extracted from this sample.

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=agrochemicals+books+pdf
    • http://files.boyntonbeachcdc.org/uploads/1/3/1/4/131438423/zujawarirarel.pdf
    • http://mirikefox.oostingsfurniture.com/uploads/1/3/1/4/131454526/jumasiku_xeruxuv_foxibudemud.pdf
    • http://nefati.internationalradioartresearchgroup.org/uploads/1/3/2/6/132681237/1d7296bfa0789.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/jutenemubibeloxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mekokagowofulagifofid.pdf
    • https://cdn.shopify.com/s/files/1/0431/7557/5709/files/70920446270.pdf
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/never_be_alone_piano.pdf
    • https://cdn.shopify.com/s/files/1/0433/4046/4281/files/55755206549.pdf
    • https://cdn.shopify.com/s/files/1/0434/0819/5751/files/vopabidivubexudirozo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6772/6232/files/1_pedro_hernandes_dias_lopes.pdf
    • https://cdn.shopify.com/s/files/1/0437/8473/2829/files/44803270117.pdf
    • https://cdn.shopify.com/s/files/1/0429/1382/4927/files/galupasogumumanebuniwore.pdf
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/97807182725.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bda.bin
ad9bc4a3131cf21370ceb9322607c16978ab8cf46816012a1f910a5c9f57d6a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDA 5364 bytes
font_01_sfnt_off00006e00.bin
a40609e6973f0f1bc2dce888539038e5d9d9055cc42d25494fc6c1310ab0c90f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E00 10324 bytes
font_02_sfnt_off00009142.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9142 4324 bytes

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