Malicious PDF — malware analysis report

Static analysis result for SHA-256 5056aa3de3fcc952…

MALICIOUS

PDF

35.6 KB Created: 2020-08-22 02:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fe41ecdca046a6efac5f535e6000934 SHA-1: 826df79f3c0fe385415c725a330b47b22c71c92d SHA-256: 5056aa3de3fcc952960d2b244456be63b13f6e0a0f931c9bac58f72e975add05
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, indicating a link farm. The primary malicious URL identified is https://ttraff.cc/pify?keyword=star+sports+live+tv+apkpure, which is likely used to redirect users to a malicious site. The document body contains garbled text and a reference to the malicious URL, further supporting the malicious intent.

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=star+sports+live+tv+apkpure
    • http://waxime.franklinknollspool.com/uploads/1/3/1/4/131407370/a241b2d9200.pdf
    • http://files.e-badmintonclub.com/uploads/1/3/1/4/131455475/b7283.pdf
    • http://tavanarix.kpcecala.net/uploads/1/3/1/3/131383770/kitafituvozowusale.pdf
    • http://files.timmilner.info/uploads/1/3/1/8/131872015/89813309f0.pdf
    • http://files.northcountryprinting.com/uploads/1/3/2/6/132682281/4734321.pdf
    • https://cdn.shopify.com/s/files/1/0432/3429/5966/files/nezaferuketagagixo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4899/1910/files/718261590.pdf
    • https://cdn.shopify.com/s/files/1/0428/2934/9030/files/definition_of_management_information_system_simple.pdf
    • https://cdn.shopify.com/s/files/1/0431/3186/3202/files/43315472446.pdf
    • https://cdn.shopify.com/s/files/1/0437/5147/3313/files/famadihana_betsimisaraka.pdf
    • https://cdn.shopify.com/s/files/1/0429/2093/5590/files/ejercicios_de_caida_libre_resueltos_3_eso.pdf
    • https://cdn.shopify.com/s/files/1/0437/7303/4657/files/civil_engineering_notes_made_easy.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0296/files/27634765034.pdf
    • https://cdn.shopify.com/s/files/1/0429/3722/1276/files/domebebowos.pdf
    • https://cdn.shopify.com/s/files/1/0428/6686/8383/files/campaign_finance_reports_nc.pdf
    • https://cdn.shopify.com/s/files/1/0440/5808/3480/files/bleeding_cowboy_font_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/6378/6137/files/kadufobifukimuwe.pdf
    • https://cdn.shopify.com/s/files/1/0436/1833/6925/files/cardinal_ordinal_and_nominal_numbers.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_off00004f70.bin
681fd3582ebe616e11694c6abda6ef1a917f139d57aba2a3df58708e4337b4f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F70 5040 bytes
font_01_sfnt_off000060a4.bin
63e16a04d61185a855c5fabd0f8bba9a5aad76afac8a3f28f5d624ed02ed5ac8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60A4 9612 bytes

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