Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7547a6df161086e…

MALICIOUS

PDF

38.8 KB Created: 2020-08-19 20:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c9ee77eea3e54ef93c6e1a15ae83590 SHA-1: 7e4d19554a05b6933388fc4916bfa731cb5d090d SHA-256: f7547a6df161086e5cb6a9e9b4c5b13e21f3c3c985d752aa724239628bf6859e
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDFs hosted on various domains, including a known malicious redirector. The primary lure appears to be "calling card format design", suggesting a social engineering pretext to entice users to click the links. The heuristic firings indicate the document is designed to redirect users to malicious infrastructure.

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=calling+card+format+design
    • http://files.ozarkfamilyoperacompany.com/uploads/1/3/0/7/130775368/690eb2ed035fab.pdf
    • http://files.kansascityamprepair.com/uploads/1/3/1/3/131398141/lajibovejup.pdf
    • http://rakimot.drtaoka.com/uploads/1/3/1/0/131070858/1523254.pdf
    • http://files.ncasc.net/uploads/1/3/1/4/131437106/visavil-jinizuwuna.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/fowuverokugoveka.pdf
    • https://cdn.shopify.com/s/files/1/0428/7895/9775/files/prism_video_converter.pdf
    • https://cdn.shopify.com/s/files/1/0438/8107/0747/files/calendario_julio_2020_para_imprimir.pdf
    • https://cdn.shopify.com/s/files/1/0441/0828/4056/files/56462027036.pdf
    • https://cdn.shopify.com/s/files/1/0430/5341/6601/files/84011322587.pdf
    • https://cdn.shopify.com/s/files/1/0435/9480/9512/files/bee_swarming.pdf
    • https://cdn.shopify.com/s/files/1/0434/3418/0769/files/38145253790.pdf
    • https://cdn.shopify.com/s/files/1/0440/8901/6472/files/graham_fuller_arap_bahar_ve_trkiye.pdf
    • https://cdn.shopify.com/s/files/1/0432/3799/8754/files/gatejumefapowutusur.pdf
    • https://cdn.shopify.com/s/files/1/0430/8136/7712/files/tezeboxubibadi.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_off00005a98.bin
30c84997c46f27de3126bd6fb9c39af2a92ed85400d6f840b304b022af393289		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A98 5248 bytes
font_01_sfnt_off00006c54.bin
ad1520c0c6318cdd180c012438ac55e98c6523be1a42db3ca84f1b98af08f394		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C54 10024 bytes

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