Malicious PDF — malware analysis report

Static analysis result for SHA-256 116c3e9d27914bf8…

MALICIOUS

PDF

41.7 KB Created: 2020-09-01 21:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ccc5bd9b4c14d6b01de02e524e18b9a SHA-1: 525d2cf2b5a0aed7c3b62d06b4280f0c4832b51d SHA-256: 116c3e9d27914bf8d0d113fd1dca1565fc1131e506c224d64a06255408c1f035
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.cc/wix?keyword=asterix+y+cleopatra+pdf+espa%25C3%25B1ol'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external PDF links, with 'https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijovosulodomozov.pdf' being the first identified. These elements suggest an attempt to direct users to malicious content or phishing sites.

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/wix?keyword=asterix+y+cleopatra+pdf+espa%25C3%25B1ol
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijovosulodomozov.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52209678420.pdf
    • https://cdn.shopify.com/s/files/1/0429/8457/1031/files/jomavusuxegukig.pdf
    • https://cdn.shopify.com/s/files/1/0432/0234/7171/files/cedulas_do_brasil_1833_a_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/0836/8545/files/xoziwaxegazuvujaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/9002/5375/files/sasorojovodapubakoronugov.pdf
    • https://cdn.shopify.com/s/files/1/0454/2434/5244/files/92966473539.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/xulijudififug.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9069/files/analyse_d_affiche_publicitaire.pdf
    • https://cdn.shopify.com/s/files/1/0430/7209/4362/files/favubomufowunexukiligevo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/moon_on_the_water_tablature.pdf
    • https://cdn.shopify.com/s/files/1/0461/8256/3993/files/levi_s_501_shorts_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/pejiwarofa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/33640275850.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/26203687058.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/einfache_lineare_gleichungen_aufgaben.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9663/files/birekifaxusup.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_off00006317.bin
18f18d7d6220d35f879a144c5d22d32d37a3e29280b7167cfc0e75dd273d20c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6317 5520 bytes
font_01_sfnt_off000075b9.bin
57ff450ca7877c75668157a55fd3210e88b0c72a0197801ed771168b3921b8f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B9 9972 bytes

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