Malicious PDF — malware analysis report

Static analysis result for SHA-256 a76fb358c6b7ca4f…

MALICIOUS

PDF

43.8 KB Created: 2020-08-07 22:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5476baa1723b6d99006d0910baa48e9 SHA-1: 510c4cc689c895ac05c877175b93525652992279 SHA-256: a76fb358c6b7ca4fc6c5cafbd05ace0a30dba4a066058193d252a3f80c4ce62b
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to suspicious or unknown domains, indicating a link farm or redirection scheme. The primary malicious URL identified is https://ttraff.cc/pify?keyword=analysis+of+financial+statements+ts+grewal+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to financial statements and URLs, reinforcing the lure. No scripts were extracted, but the PDF structure itself is used to host and distribute malicious links.

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=analysis+of+financial+statements+ts+grewal+pdf
    • http://files.garhorizons.com/uploads/1/3/1/4/131437091/9921222.pdf
    • http://files.val6heat.com/uploads/1/3/1/4/131408970/jepixup-jumujut-moxewinex.pdf
    • http://files.ptccommunitygardens.org/uploads/1/3/1/0/131069789/wifiruw.pdf
    • http://files.kilroymusic.com/uploads/1/3/1/6/131636954/xokajifelo-rosanasunebowa-zasupaterid-kagazaferezep.pdf
    • http://files.bloodsweatdance.com/uploads/1/3/0/7/130775645/bepulisenaziw_dufagazirerikes_belulefiwej.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/garoguxasesedakonexirug.pdf
    • https://cdn.shopify.com/s/files/1/0429/3260/0985/files/fipetipafi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/xevogo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8357/files/xusiwepatuvugemu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/62045895247.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/52313711091.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/rejujuwofijabimejel.pdf
    • https://cdn.shopify.com/s/files/1/0440/7453/3014/files/natobibetemu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8427/5100/files/zixebisazifoxarezav.pdf
    • https://cdn.shopify.com/s/files/1/0433/7061/0851/files/lamakogarewijujegomele.pdf
    • https://cdn.shopify.com/s/files/1/0433/8899/3699/files/gixaju.pdf
    • https://cdn.shopify.com/s/files/1/0433/9544/8997/files/babysitter_walkthrough_1._8.pdf
    • https://cdn.shopify.com/s/files/1/0437/9731/5741/files/68904469980.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e8b.bin
a9018c7f4c19f739527bfbf2580f1544498e58f77a75fac4ee10f0bd797f18fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8B 5448 bytes
font_01_sfnt_off0000710d.bin
23ad7d71e914df26904528b01b11e1a871e8a6b175d4607e152f40138d35bdfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x710D 10452 bytes
font_02_sfnt_off000093e8.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93E8 4324 bytes

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