Malicious PDF — malware analysis report

Static analysis result for SHA-256 6469705f904b56c4…

MALICIOUS

PDF

46.7 KB Created: 2020-08-25 04:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13ac68ea3c3e2887699870423833f86e SHA-1: c7540e2b64edffd2739f71379f3251586e301561 SHA-256: 6469705f904b56c4951e4e3ddb3b482a4b1cf23a6937fef09c68208a4a2ddb29
194 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL is https://ttraff.com/pify?keyword=google+night+sky+app+android, which likely leads to malicious content. The document body is heavily obfuscated and contains a mix of seemingly random characters and embedded URLs, suggesting an attempt to disguise its malicious intent. The ML classifier strongly flagged this PDF as malicious.

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=google+night+sky+app+android
    • http://komatevos.sardishenderson.com/uploads/1/3/0/7/130775274/122989.pdf
    • http://files.brisafinancial.com/uploads/1/3/1/0/131069934/semobafet.pdf
    • http://files.edithaliggagne.com/uploads/1/3/1/4/131453213/jemebigemev.pdf
    • http://kogag.qwirkykakes.net/uploads/1/3/1/8/131856166/gujifavitud_vezisudajoju_maboxabilided.pdf
    • http://pelerori.firmfoundationchristianacademy.com/uploads/1/3/1/8/131856372/watozisi_kamif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zinigezumapafukutogu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/nadopowuxomeworulev.pdf
    • https://cdn.shopify.com/s/files/1/0428/5172/9564/files/how_do_i_electronically_sign_a_on_my_ipad.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/firijifexo.pdf
    • https://cdn.shopify.com/s/files/1/0435/0862/9659/files/vofoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/8140/8420/files/11528119015.pdf
    • https://cdn.shopify.com/s/files/1/0433/7932/7130/files/jasupumozedar.pdf
    • https://cdn.shopify.com/s/files/1/0428/3547/6636/files/discord_markdown_text_generator.pdf
    • https://cdn.shopify.com/s/files/1/0439/1541/1608/files/97901684630.pdf
    • https://cdn.shopify.com/s/files/1/0432/3409/9362/files/bard_of_blood_book_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/2170/5124/files/seismic_design_of_building_structures_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/5006/6339/files/gekekitizu.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_off00007747.bin
9c028a9847c0a39d0937ea6cb98f8d1441d7e9b781ef06a7342e727fa719a985		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7747 5420 bytes
font_01_sfnt_off000089b9.bin
dcbcd12426da4cf8da0be4b35074c817ea9895f9a2285bdfa1ffdb61a6fba0ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89B9 10668 bytes

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