Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4a278ea3eaad245…

MALICIOUS

PDF

39.6 KB Created: 2020-08-18 21:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 668a3eea2c6f7a22b9c7e74bd6fa7660 SHA-1: e2a4756a112aa5eebded3d5310e39346d749ce37 SHA-256: d4a278ea3eaad24590d2f66f36945b3af481daf7997fa867e01393ff29a6ee57
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to a URL designed to lure users with a seemingly academic topic. The document body, though heavily obfuscated, contains the same malicious URL and a list of other URLs hosted on cdn.shopify.com, suggesting a link farm for SEO poisoning. The primary malicious URL is likely intended to redirect the user to a phishing or malware download site.

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=effects+of+tardiness+among+students+pdf
    • http://files.snowbergerstudios.com/uploads/1/3/1/1/131163590/e4c36f064d83.pdf
    • http://files.post39baseball.com/uploads/1/3/1/4/131407138/doxewovap.pdf
    • https://cdn.shopify.com/s/files/1/0433/4387/2150/files/benabenub.pdf
    • https://cdn.shopify.com/s/files/1/0428/6509/8908/files/mirefizexi.pdf
    • https://cdn.shopify.com/s/files/1/0449/8187/8942/files/tally_accounting_ledger_list_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/duzoketazixogasiragugukoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/xajirovop.pdf
    • https://cdn.shopify.com/s/files/1/0429/9964/4314/files/witosikovowinokonofesum.pdf
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/45850000730.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/3484378180.pdf
    • https://cdn.shopify.com/s/files/1/0435/5201/4491/files/assemble_computer_hardware_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31082235151.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/2012_jeep_liberty_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2442/4870/files/independent_audit_report_sample.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_off00005e98.bin
d88aa369424d3b9a941b22cd8a946a5ab69b2ba022fd95ed2eb2f80f12ec56ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E98 5400 bytes
font_01_sfnt_off000070dd.bin
7357c38b5f86769b21afcd29a3c14711daa2bed534554c50961901d0a2d5a5c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70DD 9684 bytes

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