Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded4b2936ac763d4…

MALICIOUS

PDF

51.9 KB Created: 2020-08-22 19:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: faac2ffd69de4ed4a01d09491001d573 SHA-1: d5a77e6ecd4dcd3a5f89d3dd941f8df97fa12fca SHA-256: ded4b2936ac763d4716f98fa7b1594b5425a840e9c74939de8f147436816ec9b
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'guitar pdf' and the malicious URL, suggesting a lure. The ML classifier strongly flagged this PDF as malicious. The presence of a large number of external PDF links also indicates a link farm, likely for SEO manipulation or distributing malicious content.

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=bwv+140+guitar+pdf
    • http://files.heliosphotomedicine.com/uploads/1/3/1/0/131070080/c6d20501c7cb8b0.pdf
    • http://files.newlifetabernacleupc.com/uploads/1/3/2/6/132681199/9358714.pdf
    • http://bogafaze.ashlandchildrensgarden.com/uploads/1/3/1/6/131637814/xobido-delepaz-dovibowafugop.pdf
    • http://tuzaxe.wellesleyhslibrary.com/uploads/1/3/0/9/130969045/jurud-kaliganopipu-rupobobagizixow-fidulosunedim.pdf
    • https://cdn.shopify.com/s/files/1/0440/6139/3046/files/tabla_de_alimentos_con_vitamina_c.pdf
    • https://cdn.shopify.com/s/files/1/0436/3865/3086/files/acrylic_sheet_cut_to_size.pdf
    • https://cdn.shopify.com/s/files/1/0439/0181/2888/files/kerikarepesitabopokel.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/46707443755.pdf
    • https://cdn.shopify.com/s/files/1/0431/9048/5150/files/gurifekewosa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/2985861495.pdf
    • https://cdn.shopify.com/s/files/1/0436/9242/5384/files/minnie_mouse_pumpkin_carving_templates.pdf
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/89133012408.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/16456434455.pdf
    • https://cdn.shopify.com/s/files/1/0433/0668/0484/files/wilepomufazetiwejozemot.pdf
    • https://cdn.shopify.com/s/files/1/0436/1181/6099/files/case_files_medicine.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xizujebekox.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_off000080d6.bin
0500bc1b221188b237d4ca40c9fce5df8ffed26cad2cb4ec172a64c228a42edc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80D6 5028 bytes
font_01_sfnt_off00009229.bin
5ed693045f6a0ab4a2780c5b30c0f1e7780db1689bac99868ae3f3d01bb96af8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9229 10192 bytes
font_02_sfnt_off0000b506.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB506 4324 bytes

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