Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d98327fca8034e0…

MALICIOUS

PDF

42.2 KB Created: 2020-08-19 14:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a6b6bda1f008addc9fb8e80c6322c14 SHA-1: 00342a164496c921a76232929a39d4dd60f6cbb0 SHA-256: 4d98327fca8034e06618e991c99a9de76f0d2603c71b8c16218d15625c1aa334
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are SEO-themed and point to potentially benign content, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. This suggests a phishing or scam attempt using a link farm to obscure the malicious destination.

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.com/pify?keyword=behavioral+therapy+for+adhd+pdf
    • http://files.rvtakids.com/uploads/1/3/1/4/131407138/mutiluseloj.pdf
    • http://kijovis.mvsutah.com/uploads/1/3/2/6/132695829/5999820.pdf
    • http://files.the21stcenturybody.com/uploads/1/3/0/8/130813108/2542227.pdf
    • https://cdn.shopify.com/s/files/1/0430/6783/4517/files/az_900t01_a_microsoft_azure_fundamentals.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85286147205.pdf
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/cost_accounting_standards_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/3601/6802/files/vmware_workstation_12_for_ubuntu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/read_incest_comics.pdf
    • https://cdn.shopify.com/s/files/1/0429/4977/1430/files/40919666492.pdf
    • https://cdn.shopify.com/s/files/1/0438/1271/6701/files/99514797765.pdf
    • https://cdn.shopify.com/s/files/1/0428/0814/8127/files/83542305130.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/26759443643.pdf
    • https://cdn.shopify.com/s/files/1/0431/6427/0743/files/98843729150.pdf
    • https://cdn.shopify.com/s/files/1/0434/0563/9836/files/mokogovugujepejoxazif.pdf
    • https://cdn.shopify.com/s/files/1/0432/3383/7224/files/tegosuvabovopix.pdf
    • https://cdn.shopify.com/s/files/1/0428/5241/7703/files/rawusuwub.pdf
    • https://cdn.shopify.com/s/files/1/0437/4098/7543/files/66217419942.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_off000067d4.bin
c0fddb606d10f664b6ac6c20e2194e5ed94a315cea85c33e286398876d23bdff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67D4 5160 bytes
font_01_sfnt_off0000796e.bin
b301aa21df7b2c8071d4b9122d0288c848fa9d522e2ec1c88bb99459512adfdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x796E 10180 bytes

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