Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e37ac94e29ee611…

MALICIOUS

PDF

45.6 KB Created: 2020-08-19 03:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae96b07937a350e320a3ab1aacf12ff9 SHA-1: 115aabc0cf8499ea1e755eb32b5fd28f708082c7 SHA-256: 5e37ac94e29ee6111632c2287d45d0a37f433981f2b4c897ae86baaa37c7f72f
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=ordering+rational+and+irrational+numbers+worksheet+pdf', which is a known malicious redirector. This suggests the document is designed to lure users to malicious sites under the guise of providing educational content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.cc/pify?keyword=ordering+rational+and+irrational+numbers+worksheet+pdf
    • http://nofufi.astiquesalon.com/uploads/1/3/1/1/131164250/8772431.pdf
    • http://waronumod.drisabelfranco.com/uploads/1/3/0/7/130739897/d583b43eb.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/9493/1624/files/nergies_marines_renouvelables.pdf
    • https://cdn.shopify.com/s/files/1/0435/5850/2563/files/fusobafibi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/nuxurijedexefixisabujub.pdf
    • https://cdn.shopify.com/s/files/1/0436/2511/9904/files/vipabifajaberuxiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/3292/0732/files/33080005508.pdf
    • https://cdn.shopify.com/s/files/1/0440/6640/6550/files/5897185568.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0492/files/tibonodijukarag.pdf
    • https://cdn.shopify.com/s/files/1/0429/5891/3689/files/54024531686.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/96649061840.pdf
    • https://cdn.shopify.com/s/files/1/0435/5201/4495/files/usa_tv_channels_app_free.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052be.bin
cafc66053d53eb8e3277a25bdee2e7701b17d43b20e552da9cba7d884a1a5f39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52BE 1964 bytes
font_01_sfnt_off00005c0c.bin
ca63221b4bee41caf9a822d37f7b9456faba385c0a67269ae088fa55e9547a3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C0C 5776 bytes
font_02_sfnt_off00006f9b.bin
17ab2078040001a115a1cf73095b4399a76838f02a5900bed57f3a237b9ccc12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9B 10500 bytes
font_03_sfnt_off00009389.bin
fb10e5badbbf29d6a05184c763452604a6d256f7c208a2bb674868c670b14a78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9389 16144 bytes

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