Malicious PDF — malware analysis report

Static analysis result for SHA-256 f830d3b2cf086e05…

MALICIOUS

PDF

42.3 KB Created: 2020-07-29 06:07:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80526e7587aea689f131f171daefa8b2 SHA-1: 7379ce48545f20469ee680c36dca57999fd0fab0 SHA-256: f830d3b2cf086e050a5029e59886e84c424f00a7f7f98ca72fba6efdf1bcdafe
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.001 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is used in conjunction with a lure for 'Schoology login information'. The document also contains a large number of embedded links, many hosted on Shopify, suggesting a link farm for SEO poisoning or to obscure the final malicious destination. The primary malicious IOC is the redirector URL.

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=schoology+login+information
    • http://files.thisiswitchdoctor.com/uploads/1/3/1/8/131856012/2ff0ce4b3707bf.pdf
    • http://files.bbluntsheabutter.shop/uploads/1/3/1/3/131383018/bajof.pdf
    • http://files.istmstyles.com/uploads/1/3/2/6/132681586/4704599.pdf
    • http://files.lyricsandpoems-cacreed.com/uploads/1/3/0/8/130813821/6881740.pdf
    • http://files.west150nyc.com/uploads/1/3/1/4/131406606/4e451.pdf
    • http://files.bblunt
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/nepixog.pdf
    • https://cdn.shopify.com/s/files/1/0432/8384/1190/files/vegumamegegufiresubekokux.pdf
    • https://cdn.shopify.com/s/files/1/0430/0842/6147/files/25733906240.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5410/files/16960945035.pdf
    • https://cdn.shopify.com/s/files/1/0431/0273/2448/files/33278117952.pdf
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/toxuwudisomajonuva.pdf
    • https://cdn.shopify.com/s/files/1/0435/4942/5823/files/sezatajogopel.pdf
    • https://cdn.shopify.com/s/files/1/0438/4528/8093/files/wurulupejefelikijufof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/14691049640.pdf
    • https://cdn.shopify.com/s/files/1/0433/7837/6867/files/fuwabavore.pdf
    • https://cdn.shopify.com/s/files/1/0435/1901/7124/files/8249330847.pdf
    • https://cdn.shopify.com/s/files/1/0429/7683/7785/files/kuvazepofigedixubonej.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_off00006767.bin
cc499205589d2e5bfd63ae9a9a9b6025bc32e17239e94a9ec7de848bc06b3aa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6767 4992 bytes
font_01_sfnt_off0000781d.bin
1f47dde479a8ee0f86da022348f506e775b511ee3b5a1f30949271cbc5770ba4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x781D 10600 bytes

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