Malicious PDF — malware analysis report

Static analysis result for SHA-256 d39bbf24e400612d…

MALICIOUS

PDF

32.8 KB Created: 2020-08-28 09:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae7e6aa3fb0c86c718a3a0991d931c6a SHA-1: 337c8064cda62ff3766b03fd8fc77a3583ba642f SHA-256: d39bbf24e400612db3b5f3d4620384d1ae24c8b9390b4bbef385246c2fab250f
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded external links, with the primary link pointing to a redirector service known for malicious activity. The presence of a large link farm suggests an attempt to manipulate search engine results or lure users to malicious content. No scripts were extracted, but the structure and link analysis strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=ark+dino+spawn+map
    • http://files.witinallshop.com/uploads/1/3/1/4/131406432/9571484.pdf
    • http://wefeka.johnhamptonphoto.com/uploads/1/3/2/7/132710780/texigifenoke-vunedogakibevi-gugonepoz.pdf
    • http://bapatig.kennardin.com/uploads/1/3/1/4/131453133/91d56a3f99cdc.pdf
    • http://files.divinecosmicalchemy.com/uploads/1/3/1/3/131380480/bizumirakubib.pdf
    • http://files.worldwidecycles.com/uploads/1/3/1/3/131378852/2199967.pdf
    • https://cdn.shopify.com/s/files/1/0433/6241/8847/files/eldritch_knight_5e_spells_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/9906/0376/files/56249686374.pdf
    • https://cdn.shopify.com/s/files/1/0435/8370/1151/files/go_math_assessment_guide_grade_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/5349/0074/files/abiotic_synthesis_of_organic_monomers_and_polymers.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/raxatag.pdf
    • https://cdn.shopify.com/s/files/1/0443/4988/2524/files/autocad_2007_free_student_version.pdf
    • https://cdn.shopify.com/s/files/1/0432/1103/0683/files/programming_concepts_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/bagunipumom.pdf
    • https://cdn.shopify.com/s/files/1/0429/0071/7727/files/zubina.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5340/files/34384427791.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_off00004554.bin
1907092a72e71a8a32bdc2fbc3d93bf0a5cc9ae8740e429a75ac6e7799472f92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4554 5220 bytes
font_01_sfnt_off00005711.bin
d1e8545019c3649820abc5ed2110e4f04754bf174081edfb0a8603642ecfd8ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5711 9244 bytes

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