Malicious PDF — malware analysis report

Static analysis result for SHA-256 160d6d4e872fe1c1…

MALICIOUS

PDF

47.9 KB Created: 2020-08-11 13:04:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 935d7beca91a664a2c2f008f513f2f0c SHA-1: ac634991babf50f6dbed9f02a02d2ec1db4f8e85 SHA-256: 160d6d4e872fe1c1a3761867b4240ffc423aa491ef7c32577102e700726ddcb9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.com/pify?keyword=pemeriksaan+penunjang+anemia+sel+sabit+pdf, is identified as a malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing.

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.com/pify?keyword=pemeriksaan+penunjang+anemia+sel+sabit+pdf
    • http://files.denverindustrialski.com/uploads/1/3/1/1/131164236/1335bfbe.pdf
    • http://files.campverdecommunitychurch.org/uploads/1/3/1/4/131406698/2767366.pdf
    • http://files.foodstartuphelp.com/uploads/1/3/0/8/130874110/1367219.pdf
    • http://files.northernfrightsfestival.com/uploads/1/3/1/3/131383791/8235283.pdf
    • http://files.michelletockyork.com/uploads/1/3/1/3/131383889/808b8735226ce7b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/zabenobovotafajemegebiwos.pdf
    • https://cdn.shopify.com/s/files/1/0438/8411/8171/files/epidemiologia_descriptiva.pdf
    • https://cdn.shopify.com/s/files/1/0433/2978/1918/files/nogumopolafetopaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6731/8167/files/github_make_new_branch.pdf
    • https://cdn.shopify.com/s/files/1/0429/8299/8170/files/femupiwafosojuxewalaliwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/upsc_cds_ota_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lujodegiduwidixerilaji.pdf
    • https://cdn.shopify.com/s/files/1/0433/7270/7990/files/class_10_cbse_maths_notes_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/6224/8102/files/fuxidinuzorelexizosapiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/8398/8125/files/brock_lesnar_ringtone_2015.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/wepibonerarafirabizukabav.pdf
    • https://cdn.shopify.com/s/files/1/0441/3577/6408/files/74505420332.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/16475204472.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6200/files/fifebemabulivogomo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6178/files/motin.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_off00007d29.bin
08f3a400acf22b49526aaefdd58124d3d09d7bd5c7c4c70d0ad72e08574ed55f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D29 5644 bytes
font_01_sfnt_off0000903a.bin
60286b3514a18c37f141d0ceb166881a1a91f4182e1e3239cc75986189a60985		 pdf-font-stream PDF embedded font (sfnt) at offset 0x903A 9972 bytes

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