Malicious PDF — malware analysis report

Static analysis result for SHA-256 10d9d2a5e766eedd…

MALICIOUS

PDF

48.0 KB Created: 2020-08-10 03:30:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65af99e4df48a4d5d1d6b999048366b4 SHA-1: 65d835d473a1f2477a3d204fba45d6e12bf8086f SHA-256: 10d9d2a5e766eedd27624d9080f75b6367ca6581d1b5de70b269b5f75f0bbb5e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which point to a link farm designed to redirect users to malicious content. The primary redirector URL is identified as malicious, indicating an attempt to lure users to harmful websites under the guise of providing a share market PDF. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=basic+terms+of+share+market+pdf
    • http://files.andersoncountygop.org/uploads/1/3/1/3/131384721/nosopux.pdf
    • http://files.sacredkinship.com/uploads/1/3/2/3/132303229/31df873b2c2c1.pdf
    • http://files.walleycreeknanaimo.org/uploads/1/3/2/7/132740204/a0dd517b69.pdf
    • http://visewo.sudancommunitylondon.com/uploads/1/3/0/7/130776644/deporana.pdf
    • http://files.caninetrainingchallenge.com/uploads/1/3/1/4/131406086/1073607.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3890/7288/files/kusenuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/7079890992.pdf
    • https://cdn.shopify.com/s/files/1/0437/0730/2037/files/neat_v5._7._1._474_full._sfx._exe.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/gamoxumajadavenixagolen.pdf
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/31139808602.pdf
    • https://cdn.shopify.com/s/files/1/0432/0329/7438/files/60582192476.pdf
    • https://cdn.shopify.com/s/files/1/0427/9851/4343/files/67597014336.pdf
    • https://cdn.shopify.com/s/files/1/0430/3912/9751/files/cv_assistant_administratif_et_financier.pdf
    • https://cdn.shopify.com/s/files/1/0433/5173/6471/files/56876214675.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zukax.pdf
    • https://cdn.shopify.com/s/files/1/0437/3292/6615/files/number_in_english.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d9c.bin
15f1f49b80f446e7933a40d6c5645ba9b1ad3ddb6c90b7ed74ec66770e7def8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9C 6416 bytes
font_01_sfnt_off00007d65.bin
62e9234268a0ae1174ba6cb84eac7a8cfb446deb42b211a1c6356dd6691a2fe3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D65 5476 bytes
font_02_sfnt_off00008fdc.bin
148a3fb208a57836b98ed1a64ad726c5d79aff8a0ff2ad3ae4d47cef2dc21cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FDC 10256 bytes

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