Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a7e9a3b1ffcd704…

MALICIOUS

PDF

36.4 KB Created: 2020-08-14 06:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6825af47a2a9cbb3cdca5621ed158b49 SHA-1: c7eede1862beb2d585f15a1c8bd58d0cd3bb7e81 SHA-256: 9a7e9a3b1ffcd704eb5ffb7f486fe3567de01681ad992ab26e875977b75c9caa
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs. The primary malicious URL is https://ttraff.cc/pify?keyword=three+branches+of+government+worksheet+2nd+grade, which likely serves as a lure to a malicious site. No scripts were extracted, limiting the analysis of further execution chains.

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.cc/pify?keyword=three+branches+of+government+worksheet+2nd+grade
    • http://wuminaxu.sombersilence.com/uploads/1/3/1/8/131871721/vukokuduwusaku-dadil.pdf
    • http://files.pawsinneedanimalrescue.com/uploads/1/3/1/6/131607131/6a4325.pdf
    • http://files.vivaluxx.com/uploads/1/3/1/8/131871952/kimokigus.pdf
    • http://bimidope.inspiredphotographic.com/uploads/1/3/0/7/130776791/biwedejulez_rerevasepugev_kavok.pdf
    • http://files.crossdepot.net/uploads/1/3/1/0/131070216/gomitodakil-repavenebek-gixilibi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/18576941854.pdf
    • https://cdn.shopify.com/s/files/1/0431/7147/9709/files/87316899246.pdf
    • https://cdn.shopify.com/s/files/1/0432/8567/6192/files/13311806489.pdf
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/48085238943.pdf
    • https://cdn.shopify.com/s/files/1/0430/0010/3073/files/contemplated_change_order.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5885/files/xupapazuwofibimile.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2677/files/24852790493.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6982/files/59469753747.pdf
    • https://cdn.shopify.com/s/files/1/0431/7334/7488/files/vudumuzu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7453/6103/files/19700909429.pdf
    • https://cdn.shopify.com/s/files/1/0431/3785/9735/files/english_synonyms_word_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1058/files/32205042391.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2277/files/xeremunilav.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_off00004ca4.bin
25f7130dbc707a87967e21eef66b1bdce805ada354fa1cb71b97ceb8fa5a4147
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CA4 5840 bytes
font_01_sfnt_off0000606c.bin
f2927aa1bbcbdeeebe85555439fc88b5670035cabea2ed66f5284d9b226a2a39
pdf-font-stream PDF embedded font (sfnt) at offset 0x606C 10536 bytes