Malicious PDF — malware analysis report

Static analysis result for SHA-256 f44e5af3fb1e00a2…

MALICIOUS

PDF

40.6 KB Created: 2020-08-07 05:36:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d87dea747d18f1b0b985aad9ac258bd6 SHA-1: ecd76bba3e574eac783382dcb578847fe642d9e7 SHA-256: f44e5af3fb1e00a285d33f6449f90d210e7e27db6ac7707e750872477623974a
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a document download. The primary malicious URL, https://ttraff.com/pify?keyword=residential+landscape+architecture+pdf+download, is identified as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDFs, suggesting a link farm designed to lure users to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=residential+landscape+architecture+pdf+download
    • http://files.sensephysiotherapy.com/uploads/1/3/0/8/130874451/nikibu-moviguj-tetixe.pdf
    • http://files.deerwoodmensclub.com/uploads/1/3/1/4/131408024/2751118.pdf
    • http://files.thewineswirler.com/uploads/1/3/2/7/132740865/ee3c0f6b96212d6.pdf
    • http://files.oldcutband.com/uploads/1/3/2/6/132682833/3768106.pdf
    • https://cdn.shopify.com/s/files/1/0439/5152/1947/files/gowet.pdf
    • https://cdn.shopify.com/s/files/1/0435/9304/0029/files/93049519433.pdf
    • https://cdn.shopify.com/s/files/1/0429/6356/6755/files/75999315104.pdf
    • https://cdn.shopify.com/s/files/1/0427/9877/6487/files/ladakovagametokelunawu.pdf
    • https://cdn.shopify.com/s/files/1/0438/8143/1195/files/70659909047.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38659434623.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8548/files/digivajolodozo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2042/7157/files/5162381809.pdf
    • https://cdn.shopify.com/s/files/1/0434/7337/1288/files/browser_detection_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0428/2990/6079/files/cgst_act_file.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/wigigeliwapemosiputo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6279/files/asientos_de_ajuste_y_cierre.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/point_slope_form_definition.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_off00005fd4.bin
fc8e643df94f37b2000c30d0fffa53df2a153ccc45ea4d0429d818018cd690d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD4 5344 bytes
font_01_sfnt_off0000720f.bin
9a314d50282435ec4e4757f09575922ec8a8f02d5c89a60a6791fd4cff505e9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x720F 10260 bytes

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