Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7eaa4e54bb6577d…

MALICIOUS

PDF

41.5 KB Created: 2020-08-21 23:20:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a6f3a62db464564a24996f714596305 SHA-1: e2e071751f4bd6b4d7e3a5beafc011b6739bd0e6 SHA-256: c7eaa4e54bb6577d52436d2e5772e9feb5aab3b83c4a26a375e0eae03c7d9657
152 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple Shopify URLs and a primary malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the URL for the malicious redirector, suggesting the intent is to drive traffic to malicious infrastructure. The ML classifier strongly indicated maliciousness.

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.com/pify?keyword=comment+arrondir+dans+une+formule+excel
    • http://files.hillsidebiblechurch.net/uploads/1/3/1/6/131637854/91fbf7c30e4dc6.pdf
    • http://fijos.paulahartsough.com/uploads/1/3/1/3/131380284/1609285.pdf
    • http://lusul.rosminicentrewisbech.org/uploads/1/3/0/7/130738870/d7bffdd8.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/77721321764.pdf
    • https://cdn.shopify.com/s/files/1/0435/4398/6327/files/44299053754.pdf
    • https://cdn.shopify.com/s/files/1/0434/5017/1554/files/11826932102.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/pokemon_battle_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/1090/8572/files/riwan.pdf
    • https://cdn.shopify.com/s/files/1/0432/4989/3531/files/13754739834.pdf
    • https://cdn.shopify.com/s/files/1/0451/1947/1781/files/25951781295.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/tungsten_guide_rod.pdf
    • https://cdn.shopify.com/s/files/1/0430/0659/1127/files/64189662247.pdf
    • https://cdn.shopify.com/s/files/1/0438/9103/2216/files/velejawekagi.pdf
    • https://cdn.shopify.com/s/files/1/0440/3465/4358/files/pernkopf_topographic_anatomy_of_man.pdf
    • https://cdn.shopify.com/s/files/1/0435/4827/8935/files/document_to_converter_software_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0433/6041/9989/files/invoice_email_template_bootstrap.pdf
    • https://cdn.shopify.com/s/files/1/0437/6153/3082/files/73297570120.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_off00005fce.bin
00bce7b04c791b570e3e1ad0d8dfc03893be90fc67722c7ddb83326264791b83
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCE 5140 bytes
font_01_sfnt_off0000712d.bin
acb249ccecf28569589c9b3707fbcd3556c6976223c3eecea925300736d708e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x712D 12004 bytes