Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f1ab818949a8a54…

MALICIOUS

PDF

43.4 KB Created: 2020-08-18 16:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd60c2a48f7e5d00def0042e99365216 SHA-1: 8d9ccd14c71451c687c1c20ff0af6fdf39713ab4 SHA-256: 5f1ab818949a8a5437ec0c0d336e4bb93724ee4a5b728b0c61d0863e9fd47fdd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to external resources. One of the primary links, 'https://ttraff.ru/pify?keyword=decision+tree+template+ms+word', is identified as a malicious redirector. The document's structure and the presence of numerous links suggest an attempt to create a link farm or to lure users into clicking on malicious URLs, potentially leading to further compromise.

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=decision+tree+template+ms+word
    • http://kexez.normanchildrenchorus.org/uploads/1/3/1/8/131856772/pipujapake.pdf
    • http://vapawe.hottopicstalkradio.com/uploads/1/3/1/0/131070158/pexaxezigelav.pdf
    • http://gomexoruv.texasranchlife.com/uploads/1/3/1/4/131405965/5240130.pdf
    • http://files.thefinerprint.com/uploads/1/3/1/8/131857758/4485ec8cce717.pdf
    • http://files.escondidoartassociation.com/uploads/1/3/0/7/130776001/8040354.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/2127/7096/files/john_deere_345_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2658/7549/files/jogo_de_tiro_apk.pdf
    • https://cdn.shopify.com/s/files/1/0430/8713/4882/files/xonufogil.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2117/files/39081743097.pdf
    • https://cdn.shopify.com/s/files/1/0434/9168/8610/files/semowafugab.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/82209513397.pdf
    • https://cdn.shopify.com/s/files/1/0432/0441/1556/files/abqaiq_oil_processing_facility.pdf
    • https://cdn.shopify.com/s/files/1/0427/9789/1751/files/2780760712.pdf
    • https://cdn.shopify.com/s/files/1/0434/8700/2790/files/xiwuraguzasokadebepenonin.pdf
    • https://cdn.shopify.com/s/files/1/0437/7742/5565/files/18506174607.pdf
    • https://cdn.shopify.com/s/files/1/0434/2788/9308/files/neuralgia_del_trigemino_tratamiento_farmacologico.pdf
    • https://cdn.shopify.com/s/files/1/0428/4055/5676/files/xusonilile.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/lakadagebewiwixudeton.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_off0000661a.bin
8183aa5ab210f02218cfa5cced40aa5a40bf577edd94f88c1740225770f3fb16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x661A 5308 bytes
font_01_sfnt_off00007813.bin
f7e426b8c15006a67132680f342a0d654bedbb63a5ba5b8a2cf052ecb84ad2ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7813 12704 bytes

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