Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b063705d8d609a…

MALICIOUS

PDF

42.0 KB Created: 2020-07-31 00:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1434049afd760d3b4a7bfa426f7f3fc8 SHA-1: a19d1d51f21abaf95064f3f84dc0a681544b2279 SHA-256: d6b063705d8d609a489ae82e6007e9ae4d0cd9f3dbe732434f5263e2208df330
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body text is heavily obfuscated and does not provide clear intent, but the presence of numerous links suggests a phishing or malware distribution attempt.

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=anti+ragging+form+du+2020+pdf
    • http://files.mankatofigureskatingclub.org/uploads/1/3/1/3/131384113/6616015.pdf
    • http://files.endofbelief.org/uploads/1/3/0/9/130969003/vatusezipusofif_nonivoxujida.pdf
    • http://files.artistsalliancesg.com/uploads/1/3/1/0/131070846/6500cc9.pdf
    • http://files.orthofeedsrl.com/uploads/1/3/1/8/131871701/2513321.pdf
    • http://files.down-the-block.com/uploads/1/3/1/4/131437980/mimizupevowitur.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3794/files/15208616641.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/31125132925.pdf
    • https://cdn.shopify.com/s/files/1/0435/3271/4135/files/18189475682.pdf
    • https://cdn.shopify.com/s/files/1/0430/9945/5642/files/867358305.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8469/files/bosumovimaxozupaxifo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5808/6559/files/nunimuzorizizaluzemogenug.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/xejowifenubuxujoxuxes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1261535930.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16175378270.pdf
    • https://cdn.shopify.com/s/files/1/0431/3628/6877/files/52057395860.pdf
    • https://cdn.shopify.com/s/files/1/0435/3445/0840/files/fopawiwakajomef.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/81159380938.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_off00005be9.bin
78a4d8b60242f2600118f408c3143a97149167c17be14eb16430ada4385c27a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE9 5176 bytes
font_01_sfnt_off00006d50.bin
73983ccd477f0e4c07634362c0f9f13a23cea415a26bff37f7f125d59a681190		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D50 1936 bytes
font_02_sfnt_off00007693.bin
b47575801b20c2f48420923ce93b663b190f0c4964258dea49ebb80f80ea9d26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7693 10436 bytes

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