Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d4647792628e2e9…

MALICIOUS

PDF

53.7 KB Created: 2020-09-16 14:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 010e7c5fbed3500aca4bbdb816ad158d SHA-1: b3a0c0ee6ad298d026d24015725c2da80460784b SHA-256: 6d4647792628e2e9ae6af0f438d411b2903c1a4191370cda049f75bf6e93c53d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, also contains the malicious URL. This suggests an attempt to lure the user to a compromised or malicious site, potentially for phishing or to download further malware.

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/wix?keyword=mils+in+a+shot+glass
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1204/6495/files/zijup.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0316/files/22802554333.pdf
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/2072852027.pdf
    • https://cdn.shopify.com/s/files/1/0438/9378/4728/files/95937975281.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/69232609593.pdf
    • https://cdn.shopify.com/s/files/1/0439/2802/7304/files/xurobipuganunixuresuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0324/7781/files/90184649132.pdf
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/bugumupizoxudexujimofipaw.pdf
    • https://53f3a2f0-dd75-466f-a78e-e155862cd52d.filesusr.com/ugd/f08e01_328b91c2448e4abc88b32fcbd6221717.pdf?index=true
    • https://b9677065-f33b-46a2-969e-588a4eec311f.filesusr.com/ugd/bfbc46_9b85822b1d204c76a84369c66c161abe.pdf?index=true
    • https://c2af496b-23ca-4f77-8911-43bac8d1049d.filesusr.com/ugd/89064d_9baddf8010364cd39f2fe169879f5865.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0435/4244/6231/files/funojuvisuxe.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/36725877101.pdf
    • https://cdn.shopify.com/s/files/1/0429/5340/8675/files/facade_construction_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/4015/1454/files/buvusosiwilikuwijudonexat.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008725.bin
bc7528bff9e35af858fc5273556f45f20e5ba008c048e55b8474b4effa47cbe9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8725 3904 bytes
font_01_sfnt_off00009531.bin
37532de5e714d57b17030237a5283ad348b57342cf68905f3c0eb00c14f702c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9531 4856 bytes
font_02_sfnt_off0000a5bc.bin
867347095f92080ea4984e0982f189682022ff904ce3f183b00c57d5f3005389		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5BC 10420 bytes

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