Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c467d01dfa4e5e…

MALICIOUS

PDF

40.9 KB Created: 2020-08-14 01:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a85e89750f8e77e73b7400decc74a13 SHA-1: 37bff466c3c46137ba10c69314ab43b038dee1d4 SHA-256: 60c467d01dfa4e5e902566e1869250d1459ef026ada29deec6d2c0355eede920
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with the primary link pointing to a known malicious redirector service. This suggests the document is designed to lure users to malicious websites, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=dnd+5e+cleric+spell+list+pdf
    • http://files.bigcountryconcrete.com.au/uploads/1/3/0/9/130969659/1878786.pdf
    • http://files.siurbancenter.org/uploads/1/3/1/4/131406864/koxorogoxof.pdf
    • http://files.robinmoulynart.com/uploads/1/3/2/6/132681698/peripaxes-foxidera-nizunezenun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66691602327.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/liwukepurenugiweda.pdf
    • https://cdn.shopify.com/s/files/1/0435/4162/7029/files/conduct_disorder_test.pdf
    • https://cdn.shopify.com/s/files/1/0439/8094/7614/files/xujexi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/88431040966.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9870/files/nusavivazadifumup.pdf
    • https://cdn.shopify.com/s/files/1/0434/3100/2264/files/railway_asset_management_system.pdf
    • https://cdn.shopify.com/s/files/1/0428/2246/7750/files/96591796554.pdf
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/80891054293.pdf
    • https://cdn.shopify.com/s/files/1/0433/7781/9802/files/bomuvanazas.pdf
    • https://cdn.shopify.com/s/files/1/0430/5272/8474/files/36054939544.pdf
    • https://cdn.shopify.com/s/files/1/0433/3689/2584/files/jopugidaxuje.pdf
    • https://cdn.shopify.com/s/files/1/0430/6737/5770/files/daraxutu.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_off000063a8.bin
da6593cd144989530fd65bece5f49b54d09a1caa302a586cbe068f0899a05083
pdf-font-stream PDF embedded font (sfnt) at offset 0x63A8 5064 bytes
font_01_sfnt_off000074f2.bin
d7ff9ff4d342b613cc298712fb1d6bf947c3defba57aeea8172838fbe7d4c2b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x74F2 9936 bytes