Malicious PDF — malware analysis report

Static analysis result for SHA-256 90983565666bc170…

MALICIOUS

PDF

40.3 KB Created: 2020-08-07 14:26:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 223c7ab91f2d9feec1cda0595d8bf02a SHA-1: aa388b0c0bfe2de371121224453ef34a1540c63a SHA-256: 90983565666bc170be9d225bdae5dbc8a1d4062e7dda45f3af4497219c084c38
154 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link pointing to ttraff.cc, which is designed to lure users to malicious content. The document body, though partially corrupted, contains Vietnamese text suggesting a file conversion lure, and the file itself is flagged by ML classifiers as malicious. The presence of numerous external links, many hosted on shopify.com, indicates a link farm strategy to distribute the malicious payload.

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=chuy%25E1%25BB%2583n+file+pdf+sang+file+%25E1%25BA%25A3nh+ch%25E1%25BA%25A5t+l%25C6%25B0%25E1%25BB%25A3ng+cao
    • http://files.mrscolessupersciencesite.com/uploads/1/3/2/7/132740423/590963.pdf
    • http://vokoza.gettankedscuba.com/uploads/1/3/0/7/130776031/66035b981.pdf
    • http://files.detarconstruction.com/uploads/1/3/0/8/130874536/vusomita-nafudunuzefodu-kovisexupalezot-danupubiluzise.pdf
    • http://files.shopbudasreddoor.com/uploads/1/3/0/7/130776735/99015.pdf
    • http://palaj.symbolicastrology.net/uploads/1/3/1/4/131407406/722c4759953.pdf
    • https://cdn.shopify.com/s/files/1/0438/3503/1712/files/wijimoduwixexa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81256704061.pdf
    • https://cdn.shopify.com/s/files/1/0437/6625/1677/files/34759101408.pdf
    • https://cdn.shopify.com/s/files/1/0440/8573/9685/files/libros_minimalismo_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/1017/8717/files/pawefabafixud.pdf
    • https://cdn.shopify.com/s/files/1/0429/8267/0485/files/mududopape.pdf
    • https://cdn.shopify.com/s/files/1/0439/0230/4408/files/felumexasigolizakebaretow.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/kusemelidemivavexusijeno.pdf
    • https://cdn.shopify.com/s/files/1/0431/6708/8800/files/wobifi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89377355024.pdf
    • https://cdn.shopify.com/s/files/1/0428/4484/8295/files/86349750170.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_off000059c9.bin
0f664b19f8894848f1a6056843011f9215aa02bc0120bfd93f7f26fee603b3bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59C9 6352 bytes
font_01_sfnt_off00006dd5.bin
b34018ed000c2d0919fe2ea1d5d4c81fc8092efd9d1452ec764b728c186b569c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD5 10612 bytes

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