Malicious PDF — malware analysis report

Static analysis result for SHA-256 e888534fa1aa99b4…

MALICIOUS

PDF

43.5 KB Created: 2020-08-24 03:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc1a43044da0748501a0c0009cb07ae0 SHA-1: 9b5de26c8da651035745bbf72ffb7761169ec3ea SHA-256: e888534fa1aa99b4002362eb192f5bbbfc5757babf93329db7f055c44624258d
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains the malicious URL and several other URLs hosted on Shopify and other domains, suggesting a link farm intended to distribute malicious content or phish users. No scripts were extracted from this sample.

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.cc/pify?keyword=circular+saw+track+guide+diy
    • http://files.evergreenpropertymgmt.net/uploads/1/3/0/8/130874691/9f21103716.pdf
    • http://muropipa.fieldtocottage.com/uploads/1/3/2/3/132303382/e524c5f540.pdf
    • http://files.illinoispeoplesaction.org/uploads/1/3/1/4/131453448/purir_sonopekuzonuwi_tubukevimowixij_xibomezejawopil.pdf
    • http://files.usasoftballmissouri.net/uploads/1/3/1/4/131438310/28410fc00d.pdf
    • https://cdn.shopify.com/s/files/1/0431/1298/8821/files/candido_ou_otimismo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1932/files/32709056525.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/social_and_institutional_aspects_of_development.pdf
    • https://cdn.shopify.com/s/files/1/0428/7548/6367/files/33540923480.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20597849085.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0312/files/gidutezeninofilix.pdf
    • https://cdn.shopify.com/s/files/1/0433/2892/9960/files/debabapupemasivefuzi.pdf
    • https://cdn.shopify.com/s/files/1/0436/8157/9161/files/supetojodugazabakikuwu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/anatomia_del_aparato_locomotor.pdf
    • https://cdn.shopify.com/s/files/1/0435/6158/2741/files/pipeline_infrastructure_renewal_and_asset_management.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/83988426230.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_off00006df3.bin
63abed66bf4f9b65e4aa780aedee126d5fc2ed7f5b2f12467c8e6689d233a193
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF3 5268 bytes
font_01_sfnt_off00007ffb.bin
f137810fec27b03ad84aaaed186eb41070764cebc08be7e9d85350b90974b14c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFB 9688 bytes