Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bd3c1e96005f1c7…

MALICIOUS

PDF

55.9 KB Created: 2020-08-07 18:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ed939024ac5209a6ac25506f297f5bf SHA-1: 921c9fe4d818db679eac8d56dee7b93b25ffc91f SHA-256: 5bd3c1e96005f1c73adc1b542065d70bc790f414a9c4f1e22e6a38939d4d5a3b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links, many of which point to a redirector service known to host malicious content. The primary malicious URL identified is https://ttraff.com/pify?keyword=list+of+important+days+in+2020+pdf, which is designed to lead users to further malicious sites. The document body, though obfuscated, contains references to this redirector and a large number of other URLs, suggesting a link farm or SEO poisoning tactic to distribute malware.

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=list+of+important+days+in+2020+pdf
    • http://files.abcformepreschool.com/uploads/1/3/1/3/131380032/bd114.pdf
    • http://files.cumministries.com/uploads/1/3/1/4/131437308/4479507.pdf
    • http://files.saborlatinotacuari.com/uploads/1/3/2/6/132695329/kikizazerepekesomak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6300/8664/files/65553652731.pdf
    • https://cdn.shopify.com/s/files/1/0431/8206/3777/files/muteremametopomiso.pdf
    • https://cdn.shopify.com/s/files/1/0430/2569/4883/files/soal_bilangan_bulat.pdf
    • https://cdn.shopify.com/s/files/1/0437/6123/8168/files/wujinelatidup.pdf
    • https://cdn.shopify.com/s/files/1/0433/9305/6933/files/tukig.pdf
    • https://cdn.shopify.com/s/files/1/0435/5129/3603/files/hades_kingdom_hearts.pdf
    • https://cdn.shopify.com/s/files/1/0430/8520/1561/files/26747642125.pdf
    • https://cdn.shopify.com/s/files/1/0432/8210/4478/files/rofelo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/vazenafonalatafadasadu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4547/6762/files/40626702900.pdf
    • https://cdn.shopify.com/s/files/1/0440/1345/3470/files/circular_economy_package.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/femowitakadipidulemobosu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6731/files/27262347123.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009b91.bin
d454c4952bde9e3401992f3db67f3e9d62bc6c30c99904659720c51d040ce4c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B91 5472 bytes
font_01_sfnt_off0000ae20.bin
c58d91ab81f9acabe3430ebbdc200b1a093cd5a09d30885bd8d4ae1503937c94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE20 10652 bytes

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