Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55afb834297af85…

MALICIOUS

PDF

57.5 KB Created: 2020-07-29 18:41:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4d47dbdcdf211619cbcc3fe107f5f70 SHA-1: 994ecf3d8ef9f1b3390b1e12c9c5961ab230772f SHA-256: e55afb834297af8542c341d18af2205dbee1c362cf3d7205b06c005a806c2db9
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure (ttraff.com). Another critical heuristic indicates a PDF link farm, suggesting a broad distribution attempt. The ML classifier strongly flagged this PDF as malicious. The document body appears to be heavily obfuscated or corrupted, preventing a clear understanding of its intended content beyond the presence of links.

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=lasombra+clanbook+pdf+ita
    • http://files.cartwheelbookawards.org/uploads/1/3/1/8/131856195/9189806.pdf
    • http://files.mindfulandpresent.com/uploads/1/3/1/4/131414240/ba9ec97.pdf
    • http://files.zichronyaakoveliyahu.org/uploads/1/3/1/6/131636841/vetikawewimuko_zupitibe.pdf
    • http://files.wardragons.info/uploads/1/3/1/8/131871704/sepogome.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/xudavuzevetozoseb.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/59899104357.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93434530871.pdf
    • https://cdn.shopify.com/s/files/1/0432/8685/5840/files/59097208352.pdf
    • https://cdn.shopify.com/s/files/1/0427/9664/6556/files/36478755347.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/borutazaweluv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riginijulu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijovosulodomozov.pdf
    • https://cdn.shopify.com/s/files/1/0431/5699/6245/files/9681183456.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/gavobej.pdf
    • https://cdn.shopify.com/s/files/1/0432/2718/5309/files/30972299766.pdf
    • https://cdn.shopify.com/s/files/1/0429/3158/5180/files/wupaxaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/dixetisiwugezavevag.pdf
    • https://cdn.shopify.com/s/files/1/0430/6078/9409/files/padozafivilowukisidone.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/58046842950.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/
    • https://cdn.shopify.com/s/file

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009878.bin
a41dcf8762b9edf4e938ecb863368bd730bf5f910b4853045de0373439a1871b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9878 5116 bytes
font_01_sfnt_off0000a9b7.bin
240fada31c6c506828c648f7e9dcdbadffd40b9116bada553972b5d8728b9201		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9B7 15260 bytes

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