Malicious PDF — malware analysis report

Static analysis result for SHA-256 37d2918fe1e55446…

MALICIOUS

PDF

43.4 KB Created: 2020-08-23 16:01:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4148fa8d86d95f0a0508bd1b10c11aa SHA-1: feaddfb1169497b27a15fddf1888265af203abf9 SHA-256: 37d2918fe1e5544682d86ab40aac84ee9ceddc0b5704005ebf28259723b90fe8
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is used in conjunction with a lure for 'Clash Royale PC Google Play'. The document also contains a large number of embedded links, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt. No scripts were extracted from this sample.

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=clash+royale++pc+google+play
    • http://files.mariamichaelson.com/uploads/1/3/1/4/131437504/wajobikuzeb.pdf
    • http://files.thedancerswardrobeltd.com/uploads/1/3/1/4/131407227/2383751.pdf
    • http://files.springgatemello.com/uploads/1/3/0/7/130775837/lixelakidetudif.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/wexurosodimakukex.pdf
    • https://cdn.shopify.com/s/files/1/0440/5323/3814/files/arpeggios_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0440/3236/0613/files/soxulabulovogifube.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8080/files/marching_band_uniforms_parts.pdf
    • https://cdn.shopify.com/s/files/1/0430/8094/1721/files/certificate_of_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0431/4460/9943/files/vamuliw.pdf
    • https://cdn.shopify.com/s/files/1/0434/0334/6078/files/9873071890.pdf
    • https://cdn.shopify.com/s/files/1/0433/4541/2261/files/27468601962.pdf
    • https://cdn.shopify.com/s/files/1/0440/1194/6134/files/alligation_method_pharmacy_calculations.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/32296071123.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_off00005fc2.bin
832df13dad862201692927b3f2e0ad15e913b54dfa3ac02f5b99f1ce0aac0e53
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC2 5204 bytes
font_01_sfnt_off0000716d.bin
fde507d3e12ec33e68adf7e75fc7402ffd28b0db1492fb6dd1e3c49ab7b9519b
pdf-font-stream PDF embedded font (sfnt) at offset 0x716D 3120 bytes
font_02_sfnt_off00007df2.bin
085c9df38a0b567e836163b78cdef92af8b1ddaf89d7b815c221fc490d7a45b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF2 10092 bytes