Malicious PDF — malware analysis report

Static analysis result for SHA-256 346a4a8c08d14372…

MALICIOUS

PDF

42.8 KB Created: 2020-08-11 16:38:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9d4a94f5cbd8b502850e2cf8a816926 SHA-1: 1226dfcb99173c2cafba9e1c16d3ea105660248c SHA-256: 346a4a8c08d143723215be0b05316881386333f608a45cf02dfffc038ab620a5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wb?keyword=sustainable%20energy%20systems%20engineering%20pdf', which is also listed as a malicious redirector. This suggests the primary goal is to trick the user into clicking the link to a malicious site, likely for credential harvesting or further malware delivery.

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/wb?keyword=sustainable%20energy%20systems%20engineering%20pdf
    • http://degeratob.stuartcrouch.net/uploads/1/3/2/7/132741555/zifemiko.pdf
    • http://dawelu.mrslovdokken.com/uploads/1/3/0/8/130874330/porisipikefuge.pdf
    • http://files.lknailsandbeauty.co.uk/uploads/1/3/2/6/132681938/wovaxale.pdf
    • https://cdn.shopify.com/s/files/1/0431/3438/6332/files/gaxasalidurukepogiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3242/0250/files/operations_management_william_stevenson_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/docker_run_interactive_shell.pdf
    • https://cdn.shopify.com/s/files/1/0433/8846/9398/files/vlookup_hlookup_in_excel_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3507/files/nusuderimalodasud.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/aggregate_testing_methods.pdf
    • https://cdn.shopify.com/s/files/1/0438/3434/3586/files/kazal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xizujebekox.pdf
    • https://cdn.shopify.com/s/files/1/0431/7344/5792/files/15160740977.pdf
    • https://cdn.shopify.com/s/files/1/0433/3004/4062/files/42728433010.pdf
    • https://cdn.shopify.com/s/files/1/0432/0329/7438/files/zonibotumave.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_off00006729.bin
301c77beb7294ae41c9de0045e90c9184e65f386629199b0b088b4f13f0da2cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6729 5704 bytes
font_01_sfnt_off00007a75.bin
a337252acf0b492ea81445fd8f635fb6513945d4cc63275e14bee01d2714390b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A75 10440 bytes