Malicious PDF — malware analysis report

Static analysis result for SHA-256 209ad8b3f4e5120b…

MALICIOUS

PDF

34.9 KB Created: 2020-08-24 15:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcfc999b8d91ceab7ed7a6cafda703b8 SHA-1: 12f089cc71a2400547219b9172166bfd3f1b87e1 SHA-256: 209ad8b3f4e5120b14b42af19d65e1049713ed51089d0cb5dbbffc68ac419824
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm and a direct link to a known malicious redirector. The primary malicious URL is https://ttraff.com/pify?keyword=jumbled+up+sentences+worksheets+for+grade+2, which likely serves as a lure to download further malicious content. The document body, though partially corrupted, contains text related to 'jumbled up sentences worksheets for grade 2' and the malicious URL, suggesting a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=jumbled+up+sentences+worksheets+for+grade+2
    • http://files.sonjabakalyarart.com/uploads/1/3/0/9/130969411/761035.pdf
    • http://turupiju.ortreport.com/uploads/1/3/1/4/131407377/9277667.pdf
    • http://files.padanijewelers.com/uploads/1/3/0/8/130874435/pisanogo.pdf
    • http://files.alexaelizabethdesign.com/uploads/1/3/1/3/131381919/2153947.pdf
    • http://files.stevecroot.co.uk/uploads/1/3/1/8/131857364/2523521.pdf
    • https://cdn.shopify.com/s/files/1/0434/3863/7208/files/21657336920.pdf
    • https://cdn.shopify.com/s/files/1/0435/4804/9572/files/dell_latitude_e6440_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0431/8674/9604/files/71079925529.pdf
    • https://cdn.shopify.com/s/files/1/0450/4164/7766/files/retained_earnings_deficit_in_balance_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/0721/2709/files/kopikokujimalo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5945/3860/files/pedevuvudusinolemef.pdf
    • https://cdn.shopify.com/s/files/1/0429/6284/5859/files/66792527062.pdf
    • https://cdn.shopify.com/s/files/1/0431/1393/9110/files/23991207951.pdf
    • https://cdn.shopify.com/s/files/1/0449/3633/1419/files/boardwalk_empire_season_5_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/29657221688.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/kuputobovirapire.pdf
    • https://cdn.shopify.com/s/files/1/0430/2074/6906/files/kadamban_tamil_movie_songs_masstamilan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/womosoravitixugefiwil.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004821.bin
0d50e192159836e6a4e9da5800884b16278a20bf2342331aaf769c4ffcfd10c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x4821 5984 bytes
font_01_sfnt_off00005c61.bin
70d63fb68f4992eb4b25e918c465e907d7fab07962dcd97746d9a24e897d55b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C61 10088 bytes