Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f83dbce468e69d6…

MALICIOUS

PDF

58.1 KB Created: 2020-08-14 03:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 817d5a6813ca7e1ca99d2508af848537 SHA-1: b207de68315810932a55bc13d388de7df92ec9c2 SHA-256: 1f83dbce468e69d61194c420ee064d863a547b73edd8bbecd360aebbdad29600
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, specifically pointing to 'https://ttraff.cc/pify?keyword=completion+letter+format'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on platforms like Shopify and other unknown domains. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the lure to a malicious site.

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=completion+letter+format
    • http://files.infosphereab.com/uploads/1/3/0/7/130776152/4747287.pdf
    • http://files.nancyives.com/uploads/1/3/2/6/132695492/rerawa-gijotiwuzumemuk-popebagoni-rimejokodu.pdf
    • http://files.sbph.ca/uploads/1/3/0/7/130775503/mugug-refatowu.pdf
    • http://gedulu.brookes.edu/uploads/1/3/1/3/131379732/somekotit_zizojifirum_jefebuxufo_ponerowowutifin.pdf
    • http://todoli.turningpointbc.org/uploads/1/3/0/9/130969596/4aff58.pdf
    • https://cdn.shopify.com/s/files/1/0429/6497/5765/files/totiwanamovuramonupezete.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7907/files/canaliform_dystrophy_nails.pdf
    • https://cdn.shopify.com/s/files/1/0437/6484/2647/files/74703084528.pdf
    • https://cdn.shopify.com/s/files/1/0437/6759/5169/files/anglican_hymn_book_ancient_and_modern.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/63526731173.pdf
    • https://cdn.shopify.com/s/files/1/0440/4166/6710/files/domowaxutifitugosazor.pdf
    • https://cdn.shopify.com/s/files/1/0433/4669/0203/files/gepinedom.pdf
    • https://cdn.shopify.com/s/files/1/0432/6991/4790/files/45833094232.pdf
    • https://cdn.shopify.com/s/files/1/0428/2351/6323/files/gogonewanaziwuto.pdf
    • https://cdn.shopify.com/s/files/1/0435/9149/9935/files/85279195537.pdf
    • https://cdn.shopify.com/s/files/1/0429/6356/6755/files/75999315104.pdf
    • https://cdn.shopify.com/s/files/1/0431/6141/9927/files/93948763425.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9563/files/zevidixasepuf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009e2b.bin
85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E2B 2828 bytes
font_01_sfnt_off0000a825.bin
8efd2c1c92c8b5b7ec9c896c6155119c4b075af533582b7edfdbd4122e0ce287
pdf-font-stream PDF embedded font (sfnt) at offset 0xA825 4772 bytes
font_02_sfnt_off0000b840.bin
119768f841fa52743869d23b3d556ffdf65bc34c247ec7d7abed389518df7a3a
pdf-font-stream PDF embedded font (sfnt) at offset 0xB840 10024 bytes