Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a64b7c7dfb4c0c0…

MALICIOUS

PDF

65.6 KB Created: 2020-08-04 03:28:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf5961b224a299a539fcc88d3fbf0988 SHA-1: 075b432d87fa9b634fd3f238087f917cbbaff181 SHA-256: 0a64b7c7dfb4c0c0275a921caeb679f7908dea899d33a99d79b6ade275d786fb
162 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract traffic. The presence of a malicious redirector and a large number of outbound links suggests an attempt to direct users to malicious websites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=faringoamigdalitis+bacteriana+tratamiento+pdf
    • http://files.marianohenestrosa.com/uploads/1/3/1/4/131453194/3325329.pdf
    • http://files.learningforlittlepeoplepreschool.com/uploads/1/3/2/6/132682076/jepolax.pdf
    • http://files.globaltesoltraining.org/uploads/1/3/0/8/130813887/jojuje_lojufobatupuwo_gonixamugo_vameliwiwivi.pdf
    • http://files.londonrecordingstudioexperience.com/uploads/1/3/0/8/130814021/1ade4be964.pdf
    • http://files.carrielwells.com/uploads/1/3/1/0/131071145/9151427.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/pezasupuvuxod.pdf
    • https://cdn.shopify.com/s/files/1/0439/7685/1614/files/wild_combatant_s_waistguard_of_cruelty.pdf
    • https://cdn.shopify.com/s/files/1/0437/5488/1185/files/company_profile_design_template_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/8000/8359/files/xelejukasidaki.pdf
    • https://cdn.shopify.com/s/files/1/0435/5755/2277/files/souled_out_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0438/2208/8354/files/pilolipidum.pdf
    • https://cdn.shopify.com/s/files/1/0429/7129/9999/files/all_sorting_algorithms_in_data_structures.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/vezivadotujuxivarijovano.pdf
    • https://cdn.shopify.com/s/files/1/0435/0348/5092/files/stevens_model_87a.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0822/files/80331909315.pdf
    • https://cdn.shopify.com/s/files/1/0428/6434/5255/files/vuzamonajiwit.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6244/files/historia_y_evolucion_del_cerebro_humano.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_off0000c2f2.bin
ebd16b2cd10af23abc6b4ef367eed3ab8d55a467dd89c62b994f3ab8af423e9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F2 5568 bytes
font_01_sfnt_off0000d5ca.bin
4f033ae01cdbd12f186ae051c4d42d7fb359b3bf978465d5d68d8a69925d79e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CA 10428 bytes

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